Robotime ROKR Marble Night City 3D Wooden Puzzle

ROBOTIME 3D Puzzles for Kid and Adults Wooden Marble Run DIY Model Craft Kit to Build Unique Gift for Teens (Marble Night City)   About this item 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 children's 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 - It'