Ugears Tractor Mechanical ModelTracking dreams The UGEARS tractor is a rattling greeting from centuries past. Pump up the fun quotient as you saunter through your farms. Q1. How is the Ugears Tractor Mechanical Model Kit different from other puzzle sets? No electronics just plywood, a rubber band motor, and tons of fun! You can shift your tractors real transmission from park to low to plow for your spring planting or step it up to sport gear and watch it race to the end of the