I have read about several preschool classrooms that use them. I'm thinking about it, but not exactly sure how I would incorporate it or it is really even appropriate at this age. Does anyone here use them? If so, how do you do them? Do you have them do a page about a certain topic? Just let it be more of a free choice activity? And, are you able to keep them from going through several pages all at once. I would think that might be difficult. I have a 6 year old who still does that!