This fun and interactive STEM challenge will interest even your most reluctant learner. Students apply knowledge of forces and motion while competing with their classmates. Teachers will supply students with a list of materials and allow them to choose which materials they want to "purchase". The goal of this STEM activity is to see which group can get their helium balloon to float the slowest to the ceiling. The challenge comes in making sure they don't weigh it down too much so it's just stuck on the ground.