I wanted to make a small car
Put two wheels on opposite ends of axle, make motor turn axle. Shouldn't be any harder than turning one wheel, assuming you want the two wheels to turn at the same speed and in the same direction.
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how would I make this motor turn the axle?
Put a gear or pulley on the motor shaft, put a gear or pulley on the axle, mesh the gears or put a drive belt across the two pulleys.
Or: Put a drive wheel on the motor, and press that against one of the wheels the toy rides on. If both wheels are fixed to the axle, driving this wheel will drive the axle which will drive the other wheel.
Oh my gosh i can't believe I didn't think that
p.s. best for sure