I Tested Every Science Gadget on Amazon

Hafu Go

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Transcript

00:00I bought every science gadget on Amazon, but these aren't just normal gadgets, they're

00:05the most futuristic, weird, and crazy inventions ever made.

00:09And the items just get more and more strange.

00:12So let's start with this 3D holographic fan.

00:15This looks like it's science fiction, but in reality, it's a gadget exploiting your

00:20persistence of vision.

00:21This is actually a fan that flashes lights while it's spinning, but it's so fast your

00:26eyes can't keep up.

00:27So your brain stitches the flashes into a smooth, floating image like a hologram.

00:32But this is just the first of many science gadgets that feel impossible.

00:36And each one messes with your brain in a different way.

00:39This is the anti-gravity machine.

00:42Look at these water droplets, they're flowing upwards.

00:46How are you able to buy an anti-gravity machine from Amazon?

00:50Well, it's actually just a trick using ultrasonic waves and flickering lights.

00:55Because this is what the water looks like when those features are turned off.

00:58So the ultrasonic waves turn the constant stream of water into water droplets.

01:03You can see if I try to mimic the ultrasonic waves by shaking it, it kind of breaks up the

01:07water.

01:09You can also add paint to make it look like alien goo.

01:12But I had a little too much fun swishing water around.

01:14Good thing one of our later gadgets is a robot cleaning assistant.

01:18And the flickering lights are timed perfectly to make the water look still.

01:22On camera, it looks like the lights are slowly pulsating, but in real life, the lights are

01:27actually flickering thousands of times per minute.

01:30This is a perfect example of how science, when used correctly, is the closest thing we

01:35have to real magic.

01:37And this is just the start.

01:38The products in this video are going to get crazier.

01:40Like this metal you can eat.

01:43And even a real levitation device.

01:45But up next is, this is just a normal piece of string.

01:48But this gadget can make it defy physics.

01:53And I can even touch it, and it still floats in the air.

01:56I can bend it at all different angles.

01:59It looks like it's floating in the air.

02:01This gadget is called the zip string.

02:03It makes the string float using centripetal force.

02:06Inside, the two motors shoot out the string really fast, but it also pulls it back at the

02:11same speed.

02:12So the tension is what's keeping the string suspended in the air.

02:16As long as the motors keep spinning, the string keeps floating.

02:21How long can you keep it up?

02:22This might look like a normal brush, but it can change colors and leaves no stains.

02:27As we take the brush and hover over each paint, we can see the color on the brush change.

02:32First, let's dip the tip into some Hafu Go Red.

02:35As you can see, the brush itself is completely white.

02:37There's no colors on it.

02:38But as we stroke, we can see the colors come to life.

02:42It's almost a very magical effect because you can see the colors fade in.

02:48The way the colors fade in almost looks fake.

02:51We can try some other colors.

02:53But how does this work?

02:54The brush uses clear paint made with leuko dyes, a special compound that stays colorless

03:01until a chemical reaction.

03:02The trick is in the paper.

03:04This color wonder paper is made with zinc ion.

03:07And your painting only comes to life on this special piece of paper.

03:11Look, I drew a portrait of you.

03:13Let's move on to the next gadget.

03:15This is a chewable piece of metal.

03:17It's called indium.

03:19It's very soft and you can bend it with your bare hands.

03:22It's soft and bendable because the metal atoms are bonded very loosely, meaning there's a

03:27lot of room to wiggle around.

03:28While most elements are dangerous to eat, indium has low toxicity and doesn't dissolve easily

03:34in your mouth.

03:35That means it should just taste like a stale piece of gum.

03:44Let's go for another bite.

03:48The texture is similar to chewing beef jerky and there's almost no flavor.

03:53But because it's metal, I feel a cold sensation when it's in my mouth.

03:56While it's safe to chew, definitely don't swallow this.

03:59This is the one time that spitters aren't quitters.

04:03And don't quit on the video yet because things are about to get sticky.

04:06This tray makes your drink unspillable.

04:08Oh no!

04:11That was a skill issue.

04:12Not the tray.

04:13Let's get our lab assistant to come and clean this up.

04:16Let's go!

04:17Yeah!

04:18It's all AI.

04:19I don't even have to do any work.

04:20So how does it work?

04:21When you swing, the centripetal force keeps the cups pressed against the tray so the cups

04:26won't fall off and the water stays in place.

04:29Now let's try a full swing.

04:31Ah!

04:32It's good!

04:33Now let's try running.

04:34That works pretty well, but can it survive a speed bump?

04:41This tray is actually unspillable.

04:43Our next gadget is this AI-powered robot vacuum.

04:47It sucks, but in the best way possible.

04:50So you've seen this lab assistant throughout the video.

04:53But now we're actually going to put it to the test.

04:55Because the company Narwhal says it's one of the smartest and most powerful robot vacuums

05:00you can buy.

05:01Powered by its dual AI chips.

05:03So now we're going to put its brains to the test with this obstacle course that we designed.

05:12Let's begin.

05:13Oh!

05:14And we're off!

05:15Immediately, we have a wire in its way.

05:20It recognizes the wire and it's mopping around it.

05:24Oh my god, it voided that perfectly.

05:26Okay, right now it's mapping out the course.

05:30It's trying to think, alright, what's the best way to pick up all these different types

05:34of debris?

05:35Now it's using the vacuum feature because it sees that it's dry debris.

05:38It doesn't want to mop that.

05:39Oh, it's so smart.

05:40Oh my god, look at that!

05:41It nearly missed the pin!

05:44The Narwhal Frio Z Ultra has two camera eyes on the front that can see and avoid obstacles

05:50in real time.

05:51That's why the pin is still standing.

05:53Alright, now it's beginning to mop.

05:55Oh!

05:56It sees that ketchup and mustard is mopping and it's able to avoid the chair.

06:00It went underneath the chair and through.

06:03The robot doesn't care the order it does its task because it uses AI to calculate what's

06:09the best way to do this.

06:10See what happens if we just drop something onto its path.

06:15Boom!

06:16Oh!

06:17It just did in real time.

06:19Just like how a Tesla is able to see and avoid cars coming onto the road suddenly, the

06:23Frio Z Ultra is able to avoid obstacles in real time.

06:28This robot is blowing my mind.

06:30It's the smartest thing I've ever seen.

06:33So right now the robot sensor is full so that's why it went back to the home base for a self-clean.

06:39It's able to fill it back with clean water and detergent for it to continue its job.

06:44Oh!

06:45Oh!

06:46It's going!

06:47It's going!

06:48It's going again!

06:49The cool thing about the home base is that it's able to clean the mop with hot water.

06:50So every time you're getting a clean mop.

06:52Oh!

06:53Oh!

06:54Look at that!

06:55It's gotten rid of most of the paint here.

06:57That's incredible!

06:58I swear some of this paint is dried already.

07:05And now it's going back home!

07:07Oh my gosh!

07:10There was a green paint check mark here.

07:13Now there's no residue at all.

07:15Honestly, the floor looks so clean.

07:17You could probably lick it.

07:23No taste at all.

07:24If you want to get one of these Narwhal vacuum cleaning robots, click the link in the description

07:28or scan the QR code on screen with your phone's camera.

07:32Thanks to Narwhal for sponsoring this video.

07:34This ball defies gravity and falls in slow motion.

07:38The ball itself is really heavy.

07:40But the moment I put my balls through the tube, it slows down.

07:43So how does it work?

07:44Well, this ball is actually a magnet.

07:47And when it falls through the metal tube, it creates electric currents.

07:51And these currents push against the ball, slowing it down.

07:54There are a lot of tricks you can do with this gadget.

07:56The first is, if you add another tube, the ball can fall forever.

08:01If I'm good at anything, it's getting it in the hole.

08:05And if you stack both tubes together, the ball can fall twice as slow.

08:10Look at that.

08:13And the last trick you can do is, if you put the ball in the middle of these two tubes

08:18and start jerking it, it's actually never going to fall out.

08:22Look at that.

08:23No matter how you jerk, it just stays in there.

08:29Now that's science.

08:31This disc spins forever.

08:32It's called the Euler's disc.

08:34But what keeps it going?

08:35The spinning heavy disc gives it strong angular momentum.

08:38That's what's preventing it from stopping.

08:40Combine that with a slightly concave mirror, which reduces friction and keeps the spinning motion going.

08:47Now the spin almost lasts forever.

08:49I wish I could last forever.

08:50But the coolest part is the sound.

08:52As it loses energy, the wobble speeds up.

08:55And the pitch gets higher and higher.

08:58Because the disc is tapping the mirror more rapidly.

09:02Until it finally stops.

09:05These rocks are millions of years old and they're hiding a secret inside.

09:09They're called geos and they came from this National Geographic kit.

09:13These seemingly regular rocks actually contain real crystals inside.

09:17And all we have to do is break them open.

09:19So let's go from the smallest to the biggest.

09:22There are a whole bunch of possible crystals we can get.

09:25And if we get the amethyst, we actually make our money back.

09:29Oh my god!

09:31That just exploded all over me.

09:33We can see inside, we got these white crystals.

09:37That one was worthless.

09:39That's the most common one.

09:41We gotta break open more.

09:44Oh!

09:45This one's cool!

09:46It's got two colors.

09:47It's got pink and blue.

09:49So we did get a small piece of amethyst crystal.

09:52But it's only a tiny piece.

09:54So I don't think we made our money back yet.

09:56We just gotta keep going.

09:57So the kit cost $40.

09:59We'll see if we can turn our profit.

10:01This looks like another quartz.

10:03Worthless.

10:07This rock I can't even crack.

10:10So, $0!

10:12This is legitimately a solid rock.

10:16Now we're moving on to the medium sized pieces.

10:19Ooh, that was easy!

10:22What the heck is this?

10:23It looks like Tic Tacs.

10:25This is another nodule of quartz.

10:28Worthless.

10:29Alright, we're getting into the bigger stones now.

10:31It's time to bring up some protection.

10:33It's a little too big for me now.

10:35This is quartz crystal.

10:38Worthless.

10:39Ooh!

10:40This is another quartz geode.

10:42This rock is our last hope.

10:44Let's see what's inside.

10:45Hopefully it's amethyst!

10:47Ooh!

10:50It's another quartz.

10:52This kit cost $40.

10:53Any total we made.

10:54So we actually made profit!

10:56But it made our floors a complete mess.

10:58Good thing the robot assistant can clean it up.

11:00Let's break into the next gadget.

11:02This is an infinity mirror.

11:04When you look inside, it's like you're looking into the dark abyss.

11:08The hole looks like it goes on forever.

11:10Almost makes me want to jump in.

11:12This is like staring into a black hole.

11:14So how does it work?

11:15Well, let's open the Pandora's box and see what's inside.

11:19Absolutely nothing!

11:21All that's inside is LED lights, a regular mirror, and a one-way mirror at the top.

11:28The one-way mirror allows you to see inside, but the reflections bounce back and forth creating that illusion of infinite depth.

11:35This simple science gadget is mind blowing.

11:37But what's coming next is even crazier.

11:39What you're seeing right now is not special effects.

11:43Instead, it's a scientific magic trick.

11:46This is called the Luber's Lens.

11:48It uses refraction to make what's behind it invisible.

11:52You see this coin? Invisible.

11:54The military actually uses the same technology to create an invisibility shield to hide all their weapons.

12:00This lens has tiny grooves that bend the light sideways, away from the center.

12:05So that means you can't see what's directly behind it, only the reflections on the side.

12:10My dad told me he went out to get the milk, but maybe he just bought one of these instead.

12:15This slime is alive.

12:17It's called the Thinking Putty because it's got a brain of its own.

12:21Here's what it looks like when you get it from Amazon.

12:23It looks like regular Silly Putty, but it's black and it sparkles.

12:27You can bounce it.

12:29Stretch it and mold it.

12:34Look at that.

12:35Right now it's very flaccid and no matter what you do, it won't get up.

12:39But remember how I said this is sparkly.

12:41That's because it's infused with millions of metal fragments.

12:45So that means it's magnetic.

12:47This is a super strong neodymium magnet.

12:50And when we put it close, it should start moving.

12:54And if you just scrunch it up, put it beside the magnet.

12:58The putty becomes a monster and starts swallowing the magnet.

13:02This is a great gadget because there are infinite ways you can play with this.

13:05I'll leave a link to this and some of my favorite gadgets in the description below.

13:09Moving on to the next gadget.

13:10This liquid is a real life venom.

13:13It's called ferrofluid.

13:14And it was developed by NASA to control rocket fuel in zero gravity.

13:18It's filled with tiny particles that react around magnets.

13:22And here we have ferrofluid trapped in this speaker.

13:25The device has a hidden electromagnet that reacts to the sound picked up by the microphone on the back.

13:31And if I make a consonant noise, it floats.

13:39Let's play some banger copyright free music.

13:44Oh, look at it jump.

13:46This is honestly one of the coolest things I've ever seen.

13:55I'll leave a link to it in the description.

13:56And we have even more insane science gadgets coming up next.

14:00This is a real life hover ball.

14:02Once we turn it on, it starts floating on any flat surface.

14:09So inside this ball is a small fan that blows air downwards.

14:13This creates an air cushion between the ball and the ground.

14:16Just enough to reduce friction, allowing you to glide across flat surfaces.

14:22Now we're going to put this ball to a real test against my employee, Martin.

14:26Martin, are you ready?

14:27I'm ready.

14:28First person to score three goals wins.

14:31And if you lose, you get fired.

14:34Wow.

14:36One, two, three, go.

14:37That was not actual.

14:41What the hell?

14:43Oh.

14:44Oh.

14:45First goal.

14:46Two more.

14:47What the heck is that?

14:50What kind of strategy is that?

14:52Shit.

14:54I'm going to kill myself now.

14:57This is an action.

14:59Oh no.

15:04No.

15:05All right, guys, that will be the last time you'll see Martin on this channel, but we can

15:14move on to the next gadget.

15:15This toy defies gravity.

15:17As we can see, the ramp is going down, but if we put the cone at the bottom, it rolls upward.

15:23And just to prove to you there's no trickery involved.

15:26As you can see, it's completely flat.

15:28If we put a normal cup at the top, it rolls downward.

15:32Bring back the cone.

15:34How's it rolling up?

15:36It seems impossible.

15:37Until you understand the science behind it.

15:39The trick is in this object's center of mass.

15:42So on a slanted ramp, the center of mass will always fall down due to gravity.

15:47So take this cup for example.

15:49The center of mass is in the middle here.

15:51So to show you the center of mass is going down, the string is going to make a straight

15:55line right there.

15:59As you can see, the center of mass ended below the string, which means it's going downwards.

16:05For this cone, the center of mass is on this little nipple.

16:08If we do the same test with the cone, as you can see, as the cone rolls upward, the center

16:14of mass is actually going down.

16:16And that's due to the shape of the cone combined with the expanding shape of the ramp.

16:21Now let's roll on to the next gadget.

16:24This is the world's strongest glass.

16:26It's called the Prince Rupert's Drop.

16:28And it's made by dropping molten glass into cold water.

16:31That rapid cooling locks in the outer shell into a state of constant compression.

16:37Making it solid and nearly unbreakable.

16:40But can it really survive anything?

16:42Let's put it to the test with fire.

16:44It's hammer time.

16:48This tip is so hard.

16:51How about an obsidian blade?

16:52The world's sharpest stone.

16:54There's a scratch, but it's not broken.

16:58Finally, let's test some pliers.

17:00Safety first.

17:01First, we'll pinch the head.

17:04That head is hard.

17:08I'm putting all my force into this and it's still not breaking.

17:10But this unbreakable glass is a weak point, which is a tiny thin tail over here.

17:15So if I pinch the tail, all the internal tension will release and the whole thing will explode.

17:22It just exploded all over me.

17:24These are the tiny shards from the glass.

17:26It almost looks like diamonds.

17:27This here is a permanent magnet that you can switch on and off.

17:31So right now it's on and you can stick it to the MagSafe on the back of your phone or even sticking to another magnet.

17:39But if you twist this big black knob to the off position, the magnet will be switched off.

17:44Look at that.

17:45It would be impossible to switch off a normal magnet because it's always turned on.

17:50So how is this possible then?

17:52Inside the magnet switch are multiple magnets.

17:55When you turn the knob to the on position, the magnets align with the steel base, creating a strong magnetic field.

18:03But when you switch it to the off position, the magnets spin out of alignment, breaking the magnetic circuit.

18:09I wish I had a chick magnet just like this one.

18:12Turning on the wrist is this simple.

18:14At first glance, you might think this is a perpetual motion machine.

18:18It's called the drinking bird.

18:20And bro's always thirsty.

18:22Now watch the liquid inside rise.

18:24The bird starts to rock until eventually he goes in for a drink.

18:29The action repeats forever as long as there's water.

18:33But to understand how it works, we must first take off its head.

18:36Inside the bird's body is a secret fluid, methylene chloride.

18:40It has a super low boiling point.

18:42So even a small temperature difference triggers a reaction.

18:46When the head gets wet, it cools down.

18:48So the vapors inside condense, dropping the pressures inside the head.

18:53Which sucks up the liquid from the bottom to the top.

18:56Until the bird dips, drinks, re-wets the head, and the cycle repeats again.

19:01Moving on to our next gadget.

19:03This ball is floating.

19:05There's nothing attached at the top and nothing attached at the bottom.

19:09It's floating using the power of science.

19:12So how does it work?

19:13This book is not a regular book.

19:16It's actually a hidden electromagnet.

19:19And this ball is actually a magnet.

19:22So right now, the two magnets are perfectly repelling each other.

19:26But as soon as I turn off the book, the ball immediately falls.

19:30And the cool thing is, you can balance any magnetic object on top of the book.

19:34It's just hard to find the right spot.

19:36I mean, you think you got it, but she's just not getting there.

19:39It's a tiny spot where it feels just right.

19:44The globe is now perfectly floating.

19:47Nothing at the bottom, nothing at the top.

19:49And because it's an electromagnet, we can even wirelessly conduct electricity.

19:54This piece will shock anyone that's coming over to your house.

19:57These gadgets today work crazy.

19:59But if you want to see even cooler gadgets, click the video on screen now.

20:03Or watch a video that YouTube thinks you'll love.

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