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You can use Knex for Domino.
K'nex Domino Seperator+Bonus (K'nex Ball Machine)by FanPlastic
how to make a domino knocker just like in TeacherOfTheWays' s rube goldberg machineby get to da parakeet
Knex Ball Machine Element: Domino Stairsby Thibault Art
K'nex Ball Machine Lift: Giant Ball Catapultby Mechanical Master
Ball Track - K'nex Compatibleby SpriceMachines