Caillou, Mom and Rosie go to the park, where they join Leo and Clementine already playing in the sandbox. Accidentally Caillou breaks a part of the sand castle as well as Clementine’s bucket. They are mad at him. Caillou is sad his friends don’t want to play with him. He offers his bucket to replace the broken one and helps them to finish the sand castle. They are his friends again.