My 3-year old nephew loves these. He likes stickers, and his mother likes his room to look neat without destroyed walls. These pop on and off very easily. I don't know about reattaching them, but they come with quite a few, and if he takes them all down and needs more, these are inexpensive. Great gift, and a good way to spend time with the little ones personalizing their own area.
Rating: [5 of 5 Stars!]