STEM Challenge: Build A Bridge Low-Prep 5th Grade Engineering & Math Project Looking for a hands-on STEM activity that’s engaging, rigorous, and easy to prep? This Build a Bridge STEM Challenge gives students the opportunity to design, build, test, and improve a bridge using limited materials while applying math and engineering concepts. Perfect for 5th grade classrooms, this low-prep project encourages collaboration, critical thinking, and real-world problem solving — without the extra prep wor