In the Paper Lifeboat STEM Challenge, students become marine engineers as they design and build a lifeboat made entirely from paper and simple classroom materials that can safely float and carry passengers (cargo). This hands-on STEM challenge introduces students to buoyancy, displacement, stability, and structural design while using the Engineering Design Process to solve a real-world survival problem. This engaging, low-prep STEM activity is perfect for STEM labs, science classrooms, engi