When I was a Destination Imagination team leader, we had weekly challenges for our team to complete with minimal supplies, all found around the house. These fun building challenges were STEM activities on a budget! The innovation and creativity that came from the kids was phenomenal. It took practice, teamwork, strategic thinking, patience, and a sense of humor, but with practice my team grew together and became expert engineers. Here are 10 building, STEM activities you can do with materials you already have at home. The key to innovation and success is to repeat the activities several times, discussing strategy, what worked and didn’t work, and how you will improve it next time. Remember to let the kids be in charge, and hold yourself back from interfering with their creative process. In all of the challenges, kids are invited to alter the materials in any way: tearing, folding, rolling, bending, etc.