These castles were made by one of my grade 3 classes using two pieces of white card.
This lesson was inspired by this lesson from dickblick.
One long piece of card was folded into seven equal sections and decorated as a castle with watercolour pencils and textas. Turrets were cut from the top and some students cut out doors and windows, made small flags to glue to their towers etc. Another piece of card, folded in half, forms the ground and background (a lot of the kids had trouble with the idea of where moats and roads should go!) Once completed I glued the castles to their background piece with a glue gun.