For the 2025 NCSU Reach for the Stars STEM Fair on 12 April 2025, Wayne Johnson and Rebecca Moore developed a learning activity featuring photographs of real snow and 3D models of ice crystals. The activity lets students see how the shapes of growing snow crystals vary with air temperature. More complicated 3D shapes grow at colder temperatures near the top of the cloud and simpler shapes grow at warmer temperatures closer to the ground.