I had bought this for my 4 1/2 year old son for Christmas but ended up opening it early because we got bored one afternoon! We had so much fun going through the pages of the little booklet, completing castle after castle. He was better at it than I thought he would be, and he loved doing the harder ones and shocking me by doing it by himself. "LOOK MOM!!!" :o) The wood blocks are excellent quality, and they fit easily back into the box each time.