The ever-active and curious Caillou is out and about again, discovering places and things he's never experienced before. No matter where he goes--to the aquarium, the indoor pool, the circus, a parade, an outdoor market, a picnic in the mountains, a great campsite, or a busy hospital--there are so many things to see. Children are encouraged to help Caillou look for out of place objects in the book's illustrated scenes and to find a specific number of objects, such as snowflakes, bees, and soccer balls, that appear in each environment. In addition to helping children develop their powers of observation, this playful, interactive book reinforces children's familiarity with the numbers 1 through 10.