George and Harold are not bad kids. They just like to "liven things up" a bit, so they and all their classmates at school can have a good time. Unfortunately, their kind acts often get them into BIG trouble. And when Professor Pippy P. Poopypants became their new science teacher... well, George and Harold almost caused a bloodthirsty, maniacal, mad scientist dressed in a giant robotic suit to take over the planet! Who will put an end to Professor Poopypants' nefarious crimes? This is a mission for the one and only... CAPTAIN UNDERPANTS!

INCLUDES FLIP-O-RAMA! The groundbreaking world-famous technique that lets you bring action scenes to life!