Biggest Bird: Sally and Nick are pretending to be birds, because it's fun to fly! But not all birds can fly, says the Cat. His friend Os the ostrich can't fly, but he can do oh so many other things! Why don't they go meet him and try to guess what he's best at doing? Off to Savannah Saloo! They guess that he's good at being big, a really fast runner, growing beautiful feathers and seeing really far away! But those aren't what he does best. They meet Os' wife and ostrich chicks and realize that being moms and dads are what ostriches do best! Just like Nick and Sally's moms and dads! Drum Di Drum: Nick and Sally are trying to make some music, but they need drums. What about the drums in your ears? asks the Cat. Drums in ears?? Dr. Giggles will teach them all about it! By shrinking down super small, they go inside Thing One's ear to explore. They get to the ear drum and learn that it's not for making sounds, but for catching them! Back at home they play their music, and thank their ear ...