Playmonster Marbleocity Triple Play 4 Bar Link Marble Machine Kit STEM NEW

New in box, pristine condition. Box opened to check for completeness. Smoke-free environment, fast shipper! ALL of my listings are in stock and ready to ship. Check out my other listings. Build a model of four-bar linkage! Use the hand crank or attach a motor (sold separately) to watch the marbles ascend and then flip-flop down again! It's part of the first Marbleocity marble machine line 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, sold separately. For ages 9 and up. Building requires only household white glue…no special tools! It's a unique and playful learning experience for beginner and experienced makers alike! Build a model of four-bar Linkage! Use the hand crank or attach a motor (sold separately) to watch the marbles ascend and then flip-flop down again! It's Part of the first marbleocity marble machine line 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, sold separately. For ages 9 and up.