Remote Control Machines: Farm Engineering self-storing dry-erase marker and eraser

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Remote Control Machines: Farm Engineering self-storing dry-erase marker and eraserConstruct four models of realistic farm equipment and four models of special attachments for them. Then control them with a multi channel, radio frequency remote control unit. Gain engineering design experience as you follow the visual assembly diagrams to piece these models together, configuring their motors, gears, wheels, axles, levers, frames, and connection points to all fit together perfectly. Build a tractor model that drives forward, backward,