Features: This assembly toy racing track car set with a stable aluminum alloy gravities powered racer and customizable plastic tracks, combining hands on creativity with thrilling speed experiments. The assembly track car kits includes track component and metal car, allowing endlessly craft while teaching basic physics principles through play. Design for aspiring engineers aged 6+ and family searching interaction STEM learning toy that foster problem solving skill. Transform playrooms into dynamic racing place where kids experiment with gravities and inertia through customizable track layouts. Selected materials ensure safe exploration of mechanical concepts, making it educational building set that grows with kids innovators curiosity. Specifications: Component: Plastic, Aluminum Alloy Product Size: Approx. Track length 390cm/153.54inch, car size 7.5x3.5cm/2.95x1.38inch Package Includes: 1 Set Assembly Racing Track Car Toy note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color the item.