To go with MFW:ECC Castles @ Germany How to build an easy catapult for kids and learn about tension. Build a simple LEGO catapult with basic bricks. Fun STEM activity for kindergarten and grade school kids.
TOWERS/CASTLES (could be modified to all themes): Craft with shapes- Make a castle/tower/bridge. Can cut shapes from felt for the flannel board for repeated picture making, construction paper, foamies, etc.