I remember watching this when I was little! I didn't like it at four, like Common Sense said, the monsters scared me!! But at 7, it was one of my favourite movies to curl up and watch when I was supposed to be having "quiet time". I'd reccomend this movie to most kids over 5, after you assure them the monsters aren't in fact, real. There is positive messages in Monsters Inc, including some of the monsters turning out to be real softies, and the kids being total sweethearts. Enjoy!!