The Cat in the Hat Knows a Lot About That! (2010)

Season 1: Episode 8

Nick and Sally make a song to their moms but can't get the end almost right. The Cat takes them to meet the best singing teacher in the world who is Humphrey the humpback whale. While bobbing in the ocean, Humphrey teaches the kids that whales communicate by singing—and that it's not how you sing that matters but what you're saying in song. Back home, Nick and Sally delight their moms with their song production.