Spring STEM Challenge – Build a Rainproof Roof is a fun, hands-on engineering activity designed for Kindergarten through Grade 2 students. In this engaging STEM challenge, students become engineers as they design, build, test, and improve a roof that can keep water out during rainy spring weather. Students begin by learning about the challenge and selecting materials such as paper, cardboard, foil, plastic wrap, tape, and craft sticks. They plan their roof design, make predictions about which m