PREMIUM QUALITY MATERIAL: This domino set uses high-quality, safe, and non-toxic plastic. The rounded, smooth edges ensure safety and stability, giving parents peace of mind and children more joy. EASY TO SET UP: Battery Installation: After installing two AA batteries (not included), simply turn on the switch to play. Domino Placement: Load the dominoes one by one into the train car. SIMULATION DESIGN: The designer cleverly uses the train's chimney as a steering module, making it fun and engaging. As the train moves, the headlights illuminate and sound effects play. CULTIVATE MULTIPLE SKILLS: Dominoes encourage creativity and boost confidence. They're great for developing intelligence and creativity, and most importantly, willpower and teamwork. PERFECT GIFT: This is the perfect gift to inspire children's thinking. Kids can play together at parties and have lots of fun. Parents can also interact with their children. The domino train is suitable for boys and girls ages 3 and up.