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Build a working model of Archimedes Screw! Use the hand crank or attach a motor (sold separately) to watch the marbles twirl up, and then roll down again! It's the first Marbleocity marble machine kit to feature colorful plastic accents! Perfect for beginners; one hour build time. Triple Play models can connect to one another for bigger fun! Also works with Marbleocity Motor Kit.
Ages 9+