Caillou wins a Meet Your Favorite Video Game Character contest and now Sonic has to spend a whole day with him! Will he survive or be tortured to death by the world's most annoying 4 year old?

Caillou spends a summer at Camp Campbell.

Caillou moves in next door to Rick and Morty.

Caillou moves to Moralton.

Caillou goes to Superjail.

Caillou moves in next door to the Belchers.

Caillou moves to Langley Falls.

Caillou moves to Quahog.

Caillou moves in next door to the Hills.

Caillou goes to the 31st century.

Caillou moves to South Park.

Caillou moves to Springfield.

Caillou goes to the Forest of Happy Tree Friends.

Beavis and Butthead babysit Caillou.

Daria babysits Caillou.

Caillou goes to school at Degrassi.

Jessie babysits Caillou and brings the Ross kids with her.

Caillou has a playdate with Charlie.

London babysits Caillou.

Miley babysits Caillou.

Carly and Sam babysit Caillou.

Uncle Grandpa babysits Caillou.

Caillou goes to the Land of Ooo.

Caillou goes to Stormalong.

Caillou moves in next door to The Grim Reaper in Endsville and meets Billy and Mandy.