He imagines himself as a construction worker and builds a road through the playschool sandlot.
Caillou the Road Builder - There's been a big storm and the playschool yard is littered with branches and other debris. The children all pitch in to help clean up the playground . When Caillou and his friends, Leo and Clementine, finish their cleanup duties they decide to build a road through the sandlot. Using simple tools and their imaginations they lay out a road, build a bridge, dig a tunnel, and even plant a tree fashioned from a leafy twig. Caillou's Building Adventure - When Daddy and Grandpa help a charity build a new home for a needy family, Caillou comes along to help hand out sandwiches. He gets to watch the grownups at work, and imagines himself as a construction worker. He also meets a new friend, Frankie, who shows Caillou where his new bedroom will be. House in the Sky - Mommy and Caillou go to visit an old friend of Mom's and her four-year-old son Kevin. Caillou is surprised to find that Kevin lives in a house in the sky - in an apartment building! He's never been in one before and finds it to be quite an adventure. He likes riding the elevator, and how the view of the city below is just like looking down on the ants in his backyard.