The present invention automatically inserts the ball and at the same time the inserted ball goes down the rail and automatically measures the speed of the ball until it knocks down the domino to arouse the user's interest, vertical and horizontal members, and inclined rail members It is possible to reduce the unit cost of the product by connecting one unit frame, as well as providing an educational Goldberg device that makes the unit frame made of wood so that you can feel the natural feeling of wood.
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