This tower building STEM / STEAM Challenges is perfect for summer – or any time of the year! It brings the joy back to your classroom with collaborative, hands-on, brain-busting work (disguised as fun)!If you have spare index cards, at least 30 minutes, and a class to inspire, run this challenge as a fun, quick task for a rainy day, or select from multiple options provided to add depth and rigor to extend this activity to days or weeks of active learning!The basic premise: Individually, or in p