The Ghost Tower may scare you a bit at first, but they are friendly spirits if you can rebuild their tower. This wooden puzzle is 5 layers high and each layer is built 1 at a time. Each layer takes 3 pieces to complete. The 9 pegs provide guidance for matching the holes in the pcs to the pegs. There are a number of ways to solve this, but it will present a good challenge for the recommended age group of 5 to 11.