Construct four models of realistic farm equipment and four models of special attachments for them. Then control them with a multichannel, 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, and turns left and right. Assemble the attachments for the tractor including a cultivator, disc harrow, hay rake, and seeder. Fix these to the back of the tractor one at a time to change the function of the tractor. Make a model of a combine harvester that moves across the floor as if it were slowly traversing a wheat field, reaping this year's bumper crop. Make a farm truck model with an interesting pivot point at its midsection allowing it to turn more easily. Build a wind rower and experiment with its highly maneuverable wheel configuration.

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