I bought this book for my son when he was about 3 and a half and he loved it. There are LOTS of mazes in it so he did a lot in the first few days after he got it, left it for a few weeks, returned to it, left it, returned to it and has continued to do this for well over a year until it is finally complete. It has always been by his choice (I think the time will come soon enough when he will be compelled to do things for the sake of his education). However, using this book seemed to spark an interest in using a pencil that has quickly developed such that he seems to be getting on really well with writing now that he is at school. Finally, I don't suppose it has much to do with my son's enthusiasm but I would also observe that the paper quality is superb. Don't you just hate that brownish grainy stuff that so many kids activity books are made from?!