Our top-rated Marble Run Roller Coaster STEM Challenge is your ultimate hands-on physical science event, perfect for grades 3rd-6th and beyond. This budget-friendly STEM activity, with reusable materials, is easy to implement. This unit guides students through the scientific method and engineering design process as they explore forces, motion, gravity, and work. We love it for an end-of-year activity for those last weeks of school. Included in the Hands-On Science and STEM Unit:Video Explanation