Features:STEM Learning Fun: This Kids DIY Racing Track Car Toy encourages hands-on STEM learning, allowing children to build their own aluminum racing car while developing problem-solving and engineering skills. Perfect for boys and girls aged 3 and up.High-Quality Alloy Construction: The DIY Alloy Race Car Track Set features durable aluminum parts, ensuring long-lasting playtime. Kids can assemble and customize their own gravity-powered sliding vehicle for endless racing excitement.Gravity-Powered Action: The Gravity Inertia Powered Sliding Vehicle requires no batteries, using natural forces to race down the track. A fun and eco-friendly way to teach kids about physics and motion.Creative DIY Experience: The Chi.