Want a fun but educational STEM activity to do this Valentines Day? This lab is top selling in my TpT store and I have now made it Valentine's Day themed!Teach your students the difference between PE and KE through this fun STEM challenge of building a catapult! Use this for introduction to the concept or for reinforcement! Having a visual and a kinesthetic tool to build a foundation for a scientific concept ensures success in the classroom! Students got an absolute kick out of building and ca