After second-grader Stink gets an unsatisfactory grade in physical education, his parents tell him he must play a sport and so he masters thumb wrestling, as seen on a sports channel.

When Stink's parents win an aquarium sleepover, he and his two friends enjoy a scavenger hunt before trying to fall asleep while worrying about the frankensquid on the loose.

After a close encounter with a mutant amphibian makes him freaky for frogs, water-shy Stink becomes a swimming success after being in the Polliwog swim class frog-ever.

Stink may be a super science freak, but even Dr. Stinkelstein is feeling freaked out about having a slime mold living and growing in his very own room. At Saturday Science Club, Stink learns that these one-celled organisms are smart enough to find their way out of mazes and gang up on food sources.