Caillou wants to play with both his friends Clementine and Xavier in the playschool playground. Unfortunately Clementine wants to play bears and Xavier wants to play astronauts, and a little argument ensues. At story time Miss Martin tells them more about spaceships and astronauts and Caillou imagines he's zooming around the galaxy exploring stars and planets. Back outside Caillou makes up a new astronaut and bear game so everyone can play together.