Caillou learns about the mechanical world around him in this episode of Caillou. Machines mainly involve transportation. Caillou rides on the subway, does repairwork on his bike and accompanies his parents to go car shopping after a mechanical failure in their old car. Caillou also pretends to be a bulldozer. Today, Rexy is hiding inside a box when Gilbert and Teddy come outside and say it's lunchtime. There are three boxes and they can't find him in two of them. He then pops up of the one in the middle and scares them both. He wants to play a game, pretending that the boxes are a singing train. It's okay with Gilbert, just as long as it doesn't take too long. He's getting hungry. So they all sing the "Silly Train" song and arrive back in time for lunch. As for Caillou, he's learning all sorts of things about machines and even doing some machine operating of his own. "As Good As New" Caillou's inside watching Sarah biking from a window and asks Daddy if they can go biking too. Daddy says that it's a good idea, since it's a nice day out. They head outside and both get their bikes, checking to make sure that everything is okay with them, such as air pressure on the tires. They bid goodbye to Mommy and Rosie who are going out to shop. Just then, Leo and his Dad show up. Leo has a fancy new bike with a flag and streamers. Caillou wants to try it out, but at first Leo won't let him. Leo's Dad urges Leo to let Caillou ride it for a bit, saying that he's sure Caillou would let him ride his bike. Caillou has fun riding on it and thanks Leo for letting him try it. Leo and his Daddy head on their way and now Caillou seems a bit sad. He wants his bike to be like Leo's. Daddy says that if they clean their bikes, he's sure they would be better. So they clean them off, but Caillou still isn't satisfied. He wants streamers (or "steamers" as he calls them at first) and a flag. They go inside and use yarn and other materials to create these things. Caillou decorates his bike (thetvdb.com)