Things You'll Need
Instructions
Purchase a "LEGO Technic 8293: Power Functions Motor Set" from a toy store or online dealer.
Remove the cover of the battery pack in the motor set. Insert 6 AA batteries with their terminals correctly orientated according to the signs.
Install the motor in the desired place on your Technic model, then arrange the mechanics correctly so they can be powered when the motor is moving.
Connect the battery pack to the motor with the provided cables. Turn on the motor to start the movement.