We have covered a bunch of marble machines here in the past. The Marble Mover is a cool mechanical toy that can be operated manually or with a battery powered, variable speed motor. As the wheels turn, the marbles go up the steps and drop into the chute to roll down to the end.
More gadgets like this: here
Marble Mover is available in 5-step and 7-step versions. Each version comes with a detachable “Power Pack” motor.
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