Wheels give us freedom: Freedom to travel and freedom to learn science. Bicycles, skateboards, trains, cars, and escalators use wheels to help us move. When we make models of wheeled devices, they help us understand physics and give us the freedom to understand. In this session participants will construct a wide range of models from materials that are free or charge or quite cheap. Using a totally hands-on, inventive, and active learning approach, this session will keep you active, learning, and smiling.