Caillou learns about magnets; Caillou finds out about dinosaurs in a museum; Caillou pretends to explore the stars. "Magnet Madness" - Caillou is in the kitchen, where he's just finished drawing a picture. It features himself and Clementine on the swings. Mommy compliments the pictures and says that he should hang it on the refrigerator. Caillou heads to the refrigerator and puts a magnet on it. He's delighted at the almost magical way that the magnet flies out of his hand. Mommy tells him that magnets stick to lots of things. He grabs up a few magnets so that he can test out some things to stick them too. He finds that they stick to some of toys, but won't stick to Gilbert or Rosie. Nevertheless, he gives the "R" magnet to Rosie to play with, since it's the first letter of her name. He also tries to play with Gilbert, but Gilbert's not interested. He finds his Daddy hard at work on on a birdhouse. One of the magnets sticks to his workbench and he explains that it's because it's made of metal. He tells Caillou that magnets only stick to things made of metal. Caillou decides to get a whole bunch more magnets in hope of finding new things to stick them too. He removes the entire alphabet of magnets from the refrigerator and sticks them on things all around the house. He notes that they can stick upside-down and imagines that he's a superhero named "Magnet Man." Mommy finds him and tells him that it's time to put the magnets back. He searches all over the house to find all the different places he puts the magnets. He comes upon Daddy again and asks if he can help with building the birdhouse. Daddy agrees, but just then, he drops a hook needed to hang the birdhouse. Caillou tries using one of the magnets to retrieve it, but it just won't reach. Daddy suggests tying a string around it to extend the reach, and this works. Caillou is pleased that he was able to help Daddy. That night at bedtime, Mommy finds the last missing magnet, the letter "Z," stuck to Caillou's lam (thetvdb.com)