ROBOTIME 3D Puzzles for Adults Wooden Marble Run DIY Model Craft Kit to Build Unique Gift for Teens (Marble Night City)

Marble Night City – This 3D Wooden Marble Run Kits is powered by hand cranking, gear rotation, endless loop steel balls(package include 10 metal balls), you can feel the charm of machinery. Exquisite Workmanship – This 3D Wooden Puzzle cut with exquisite laser technology, all parts are made of high-quality, non-toxic, tasteless and recyclable safety materials, no tools nor glues needed. Challenge & Fun – A brilliant design and teaches patience, problem-solving, and engineering, cultivate childrens hand eye coordination ability. It’s a great way to bond with your kids. You can even paint the designs. Easy to Assemble – 294 pcs, made of Pre-cut Wooden sheets. Each puzzle is numbered, you just need to assemble it step by step with our detailed English Illustrated instructions. It takes about 7 hours. Perfect Gift & Decoration – Its an amazing gift for home & office decoration to friends, kids, parents and mechanical lovers. Exhibition effect will surprise everybody and give you a great sense of accomplishment once completed.