Science & Play - Mechanics Crawler TractorA sensational new kit to build a crawler tractor driven by an electric motor and cultivate a passion for mechanics! Over 200 components to build 20 models and technical applications. The tractor also has agricultural equipment driven by the motor via a mechanical transmission system. The components included in the kit include gear wheels, tracks, transmission module, panels, and an electric motor to build, disassemble and rebuild all the models. A