ROBOTIME Mable Run 3D Puzzle Wooden Model Kits for Adult Construction to Build, Mechanical Model Building Craft for Teens Waterwheel coaster

COOL WATERWHEEL COASTER: This Marble Run puzzle was inspired by the civilizational origins of paddy field irrigation, taking you back to the age of machinery. It is a very sophisticated classic model. A combination of fun and viewing.
IMMERSIVE AND FUN TO PLAY: This wooden model kits is suitable for adults to build. The ball is quickly entered into the orbit through the spin-in accelerator-magic funnel, and then passes through the transport car. Funny! It doesn't need batteries, just shake the handle to drive the gears in an infinite loop.
EASY TO ASSEMBLE: The mechanical 3D puzzle is assembled from 233 pieces of wood and small steel balls. Clear pictures with detailed English descriptions, which are easy to follow and build with manual. Wood products are fragile and require extra care when assembling them. You'll love this fun trackball game when you're done.
ORIGINAL DESIGN: Absolutely original design, a one-of-a-kind architectural model kit. Not only a work of art, but also a puzzle game. Laser cut each piece of wood, smooth and burr-free. Use non-toxic wood materials with confidence. As long as you buy any product from ROBOTIME, we offer free parts replacement within two years.
COOL GIFT FOR ADULTS AND KIDS: This 3d wooden puzzle is definitely a cool model for adults or craft lovers. Fun crafting game for boys who can get off the iPad and develop their hobby. It is also a Christmas, Valentine's Day, birthday present for your boyfriend or husband.