Features: 1. Automatic laying function - after the placement is completed, the dominoes will automatically place cards during the driving process, push the cards, the dominoes will appear, and have a chain effect, rolling like a race. 2. After the placementis complete, the dominoes will automatically cast cards during the driving process, push the cards, and the dominoes will appear and create a chain-like effect, rolling like a race. 3. It's a fun toy, especially if you and your kids/grandkids aredomino racing fans, it can also be used as a Christmas gift, Halloween gift, kid's birthday surprise and jigsaw puzzle, bring joy to kids entertainment time4. Our domino train building blocks set can develop children's motor ability, color recognitionability, teamwork ability. Colorful and beautiful appearance can stimulate their brain and mind development. 5. It can cultivate children's hands-on ability, color cognition, art cognition, senses, cognitive ability, imagination and creativity. Note:*Due to different monitors and light effects, the actual color may be slightly different from the picture *Please allow 1-3 cm deviation due to manual measurement Size: As the pictures show Batteries: 1 x AA battery (not included) Included:1 set x Domino train building blocks setShipping Quantity: 1 SetPackage Contents: Only the above package content, other products are not included.Size: 7*16*10.5cm(Reminder: The size is measured manually, please allow 1-2cm measurement error)color: blue(Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.)