3D Wooden Marble Run Puzzle – DIY Mechanical Gear Ball Track STEM Kit

Build, play, and display with this 3D Wooden Marble Run Puzzle Kit! This DIY mechanical gear ball track is both a fun challenge and a fascinating STEM project. Assemble the precision-cut wooden pieces to create a working gear-driven marble run that sends balls cycling through twists and turns.<br><br>Features:<br> • DIY 3D Puzzle Kit – laser-cut wood pieces fit together with no glue needed<br> • Marble Run &amp; Gear Drive – watch gears and tracks move the balls in an endless loop<br> • Dual Power Options – works with manual crank or electric motor (uses 3 x AA batteries, not included)<br> • STEM Learning &amp; Fun – great for kids, teens, and adults who enjoy engineering and building<br> • Display Worthy – unique model for your desk, office, or hobby shelf<br><br>Condition: Brand new in box (outer packaging shows minor damage, see photos). All parts included.<br><br>Perfect for puzzle lovers, hobby builders, or anyone looking for a creative gift. Great choice for birthdays, holidays, or family STEM projects!