Caillou's clowning around today and having a wonderful time. Seeing Bravo the magician at a friend's birthday party inspires Caillou to become Caillou the Great and put on a magic show of his own. He plays the clown for a wary Rosie, who's afraid of clowns until Caillou shows her they're just people wearing silly costumes. Then, Caillou gets to go to a parade; has another pretend parade with Dad; and even makes puppet clowns with Grandma. Caillou is very excited when the family takes a trip across country by train.