3D Wooden Puzzle Adult Solar Power Marble Run Model DIY Assembled Craft Kit Mechanical Gear Building Engineering Educational Toy Set Christmas Birthday Gift for HusbandBoyfriendTeen Boys Home Decor

Functional and fun Mechanical 3D Wooden Puzzle Model Kit Solar Marble Run Kit Perfect toy to enhance your children's Science, Technology, Engineering, and Math skills. Build a tinkering labs at home for ages 7 8 9 10 11 12 13 14 teens and above ! Unique Design: Indoor and outdoor dual-use 1.Place it indoor: Connect wire of motor with the battery case, 2 pcs of AA battery requested. (not included ) 2. Place it outside on a sunny day: Connect wire of motor with solar panel, the solar panel can turn the sun's light into electrical power for its motor. Product Description: Model Size (Assembled): 15 * 10.5*12in (5.9*4.1*4.7cm) Package Size:26*18*5.2 in(10.2*7.09*2.05cm) Weight: 520 G/1.23 LB Material: made of premium wood Number of Components: 29pcs For adults or kids 6+ ages Assembled Time:1-2H Please Note: 1. Battery and glue are not allowed to ship by air transportation. 2. Most of the parts tight fit need no glue and be careful to connect all parts in a way that doesn't require you to force them into place. You can use a little glue to make some components stick securely. Build it carefully to ensure it runs well. 3. Please don’t put it in a wet place.Keep away from fire sources.