By altering gear ratios, vehicle weight, traction systems and wheel sizes, students build vehicles with the greatest pulling power. They can try to move the greatest weight or pull another vehicle across the threshold. A fun learning experience.
The starter pack includes:  reusable vehicle kits (see contents below), connecting chain and instructions.
Each reusable vehicle kit comes with:  car platforms (6 x 12 in.),  traction bands,  wood wheels (1-1/2 x 2-1/2 in.), gear box kit, motor, wires and hardware (screws, nuts, etc).
Requires one power supply (841051) per vehicle.