Remember my husband's castle. We one day after we visited it again, my son built a castle at our house. Since I teach Joy School I had been saving "good stuff" in a box, ie old boxes and egg cartons, in preschool we built a tower taller than the girls as part of the lesson. The good stuff was still in the house, and J had a blast building for a day or so with it. Here is the castle modeled after his dad's.