Caillou has a beanbag race with his friends and builds Gilbert a doghouse with a box and crayons.
Caillou is excited when Miss Martin takes him and his friends to the park for some special activities. They have a beanbag race, but the rules are not easy to grasp, and the kids have a few comical mishaps in the process. Caillou discovers that you don't always have to win to be proud of yourself. Grandma has given Caillou a special spaceship plate. Caillou loves it so much that he carries it everywhere with him and he wants to eat every meal from it. After finding a photograph of a four-year-old Dad with a model train set, Caillou and Dad decide to look for it in Grandpa's basement. After a while, they finally find it and set it up to test it out. Grandma captures the moment in a photograph which Caillou decides to put in the photo album beside the old picture of Dad. When Caillou spots a dog house outside he gets the idea that Gilbert might like a house of his own. Caillou finds a cardboard box and some crayons and with Gilbert's help, he decides how to decorate the house. Grandma takes Caillou on a special visit to a sheep farm. There, Mary, a 10-year-old girl, takes Caillou on a tour, teaching him about sheep, sheering, and the spinning of wool.