Create imaginative railway adventures with the Contixo MT5 3D Gear Track Building Set. This 147-piece snap-fit system lets kids design horizontal, elevated, vertical, uphill, downhill, sideways and upside-down track layouts. An advanced gear-rail drive keeps the rechargeable motorized train connected to the track as it moves through challenging 2D and 3D routes. The included remote controller adds interactive play, while supports, suction cups for vertical mounting, traffic signs, decorative stickers and accessories help create detailed railway scenes. Hands-on construction introduces gear transmission, gravity, balance, motion and mechanical principles while supporting spatial reasoning, creativity, problem-solving and fine motor coordination. Designed for ages 6 and up, the set includes a Usb Type-c charging cable and durable Abs plastic components for screen-free Stem play.