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

S3E2 Accidents Happen... If You're Lucky/Making Waves

After Sally accidentally wrecks Nick's mountain model, the Cat introduces them to Sara of Serendip, an inventive spirit who teaches them that mistakes can lead to unexpected discoveries. Meanwhile, Nick realizes that Sally can't hear his shouts from his bedroom window when it's closed. To help them understand this, the Cat takes them to the Soundy Sea, where they learn about how sound travels in waves.