S1·E21 Caillou's Summer Goodnight

Caillou is tossing and turning. No matter what he does he just can’t get to sleep. It’s summer and his curtains are at the cleaners. Luckily Grandma has a wonderful idea: She makes a cardboard cutout night sky to put against the window. It darkens the room and projects the moon and the stars onto his walls and ceiling. Caillou falls asleep in no time.