ROBOTIME 3D Wooden Puzzle - Hand-cranked or Electric Model Coaster, Waterwheel, Gears, Track, Roller Coaster - Perfect for Craft Enthusiasts, Concentr

"New Marble Product!" RoboTime's Marble series introduces a new product! Perfectly compatible with "Night City" (motorized set sold separately). The mechanical appearance will captivate both adults and children, and the combination with the 3D puzzle features doubles the fun! Stimulate your imagination while enjoying the mysterious atmosphere and the beauty of the intricately assembled machinery! Recommended age for this 3D puzzle motor model: 14 years and older; Number of pieces: 472pcs.

"Dual Mode" Features a dual mode switchable between manual and motorized operation. As a toy, turning the handle will make the gears rotate, the ball climb, fall, and spiral accelerate. Pressing the touch switch switches to motorized mode. No batteries are required, but it is designed to be powered via a USB-C cable. The cable must be provided by the user.

"Challenge and Accomplishment" This 3D puzzle requires assembly. The instructions are written in English, but are illustrated and easy to understand. The instructions are in full color and carefully explain every step, making it suitable even for beginners. This toy, which combines STEM education and leisure time, is sure to captivate not only children but also their parents. Parents and children can work together on the project, enjoying their free time while training hand-brain coordination, enhancing visual perception, and stimulating spatial imagination.