Caillou Stickers! ($0.99) Get creative within Caillou’s world! Play with everything in Caillou’s life: his pets, friends, foods, toys and more. Use the 138 stickers and your imagination to design your very own scenes. You will find special backgrounds to get you started, like a campground, bus stop, farm house, and birthday party. Each sticker features custom sound effects, and each scene has endless possibilities!