Caillou learns more about living in his neighborhood and what that entails in this Caillou episode. "Caillou's Horn" Gilbert is outside chasing a butterfly. Caillou tries to catch the butterfly with his net, but misses. Sarah shows up and shows Caillou an old toy horn of hers. She explains that she and her Mom are going to go and donate some of her old toys to the Community Center. She says she has to leave, so Caillou hands her back the horn, but she says that her Mom said it's okay for him to keep it. Caillou loves the horn, but at lunchtime, Mommy tells him that it's not an appropriate time to play with it. She sets it aside, but Rosie gets ahold of it and so Mommy moves it out of her reach too. Caillou eats quickly so that he can play with the horn some more. He goes outside to play with the horn and ends up scaring away some birds. Mommy comes out and says that she's taking Rosie to the store with her. She asks if Caillou wants to come and he asks if he can bring the horn, but she says that he can't. So he decides he doesn't want to go. He's starting to get annoyed at how it seems like it's never the right time to play with the horn. Daddy says that he'll take him someplace where he can play with the horn all he wants. Caillou goes to the playground and has lots of fun. Atop a slide, he spots Sarah and calls out to her, but she can't hear him. So he toots the horn and it gets Sarah's attention. Finally, Caillou found the right time to toot the horn. "The Mighty Oak" Caillou is outside swinging in his tire swing, while Daddy reads the paper. He hears an odd and loud sound and wonders what it could be. It turns out that it's coming from Mr. Hinkle's house. Caillou and Daddy go over and find that a hired worker is cutting down Mr. Hinkle's tree. Mr. Hinkle explains that the tree is sick and the branches are getting weak. He's having the man cut it down, so that it doesn't fall down on its own and hurt anyone. Later, Caillou and Daddy have the man come and e (thetvdb.com)