I have a 4 year old who doesn't always nap anymore. She is in a room by herself on a mat with some books for at least an hour. Sometimes she falls asleep, sometimes she doesn't, but she is not allowed to get up until an hour has passed. She can then watch television for the rest of nap time. This is a new development. Until she was 4, she had to spend the entire 2.5 hours on her mat, and she usually slept.