When his excitement scares away the birds, Caillou pretends to be an explorer startled by Bigfoot; when Caillou thinks his snow buddy isn't as good as Sarah's, he feels inadequate and embarks on a construction fantasy.
At the grocery store with Mommy, Caillou sees Ms. Martin outside of school for the first time; after suggesting a game that Tina might have trouble playing with her prosthetic arm, Caillou insists they play the one game he knows she likes.