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.
Did you know you can build an amplifier for your cell phone using LEGO DUPLO bricks? This is a fun STEM experiment for children, where they can start to learn about sound waves. Create a box out of LE (Tech Projects)