This is part 29 of my 100% Super Mario 3D World Walkthrough. This part includes World Star-7 Gargantuan Grotto. Below are the times for the green stars and stamp in this stage.
01:15 - Gargantuan Grotto Stamp Location
01:43 - Green Star #1
02:35 - Green Star #2
02:57 - Green Star #3
