We bought a package of paper cups at our local Wal-Mart to make our castle. I think there were 50 in the pack. They were originally white, but we thought that was kind of boring so since I happened to have some spray paint sitting out in the garage, we had fun painting them red (and a couple turquoise). After they were dry we tried different ways of stacking them together to form a castle and this is what we came up with.
We made the three walls first and ended with the front of the castle. The top towers of the castle were made by cutting 10 small slits around the cup and then cutting every other flap off.
So what are you waiting for? Go grab some cups and get creating! 🙂