Caillou's Playschool is a location in Caillou's neighborhood.
It is also known as the daycare, play group and preschool. It first appeared in the season 1 episode, Caillou at Daycare. The playschool is small and has a short entrance with cubbies and one big room with toys, several bookshelves, a fish tank, a snack area and art section. There is a playground outside. Caillou's playschool class is small and includes Caillou, Clementine, Emma, Jason, Jeffery, Leo, Xavier and Lee-Wun. It also has a few other kids such as Mara, Melanie, Wendy, and Allen. Ms. Martin always runs the class.
In 'Caillou's New Adventures', the playschool is no longer seen, and instead Caillou seems to go to a regular school (or at least a school with more than just one grade, judging from how the outside of it looks). Miss Martin is still the teacher of Caillou's class, but many notable changes were made. For one, Sarah is now in Caillou's class, and the class seems more like that of a regular elementary school curriculum-with tests,grades, and learning/lessons rather than how playschool ran as more 'play' focused.