Cat is not pleased to be tapped as substitute teacher. Not only is it cutting into his naptime, but a roomful of kittens is a little, well, terrifying. Still, off to school he goes, where, faced with six adorable kittens, he follows the lesson plan - music, building, painting - but in pure, mischievous, unadulterated Cat style. By the end, he and the kittens have formed a rock band, built a fish-spewing fountain, covered the classroom in blue, yellow, and red paint, and Cat has learned a thing or two about inspiring others by being himself. But even more heart-melting is what the kittens have learned from Cat.