UPC 192073409153

• 3D MARBLE RUN PUZZLE: Build a 12.5" x 9.25" wooden marble run coaster from beautiful, laser-cut wood pieces, with no glue and no tools! Pieces slot together securely to make a sturdy finished model.
• A REWARDING CHALLENGE: This intricate marble run combines all the benefits of traditional building sets with principles found in leading STEM toys for a highly satisfying and educational experience. It will exercise and improve your fine motor skills, creativity, perseverance and dexterity.
• ENGINEERING MARVEL: A manual crank moves the marbles through the course by setting an elaborate system of steel shafts, cogs, gears and wheels in motion smoothly and seamlessly.
• DISPLAY WORTHY: A masterful, awe-inspiring finished form makes this intricate marble run one you'll want to display for years to come.
• INCLUDES: 5 wood sheets with 191 precut pieces, 1 crank handle, 10 rubber washers, 15 wood rods, 2 steel shafts, 2 spacers, 1 isolation column, 1 screw, 2 nuts, 10 steel marbles, wax, glue and illustrated instructions.

This working marble coaster is part architectural genius, part engineering marvel. Once you assemble the laser-cut wood pieces, turn the crank to set the elaborate system of gears, rods and wheels in motion. You will be fascinated and surprised by the way the marbles move continuously through the course.