Gear drive supports steep climbs and vertical routes. 3D Modular Track Adventures: Build varied-height railway layouts with bridges, tunnels, elevated routes, steep slopes, winding curves, seesaw-style sections, and traffic signs, then rearrange the pieces into new route combinations Two Rechargeable Anti-Gravity Trains: The Christmas-themed red train and white streamlined train light up in motion. In testing, each ran for over 2 hours on a full charge Easy Twist-to-Lock Building and Expansion: Align the circular connectors, join the track modules, and twist by hand to lock or release them.