Caillou discovers new things today and is so excited when Daddy brings home a computer. He learns to share the computer with his entire family - even Gilbert! Caillou and Leo are playing dinosaurs in the backyard and discover a fish fossil rock. They visit the library to learn more about dinosaurs and fossils. Also, Caillou takes his first flight and he's curious about everything. Then, Grandpa discovers a new planetarium is opening and there's a prize for the best space costume. Caillou is thrilled when the winner turns out to be...a surprise!