This challenge blends winter STEM, winter math, 3D geometry, and SEL skills into a hands-on activity that feels playful while delivering deep learning. The Winter Waiter STEM Challenge asks students to work in teams to design and build a waiter-style tray that can safely transport “snowy” 3D solids through an indoor relay course. Students test, analyze, and redesign their trays while working within a clear set of criteria and constraints. Winter STEM challenges are an effective way to chann