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.
Not free, but for those girls interested in science these are great Apps, problem solving whilst having fund rescuing Robots etc. If they are going to be on the computer, better it be science I reckon.
Are you looking to inspire your child and develop their thirst for knowledge from an early age? It’s never too early to introduce them to STEM activities. Start now with these fund hands-on Halloween STEM activities.