Specification: Features: 1. Automatic Laying Function - Dominoes will automatically cast the cards during the driving process after the placement is completed, and push the card and the dominoes will appear and have a chain-like effect that rolls like a race. 2. Dominoes will automatically cast the cards during the driving process after the placement is completed, and push the card and the dominoes will appear and have a chain-like effect that roll like a race. 3. This is a fun toy, especially if you and your kids/grandkids are domino racing fans, can also be used as Christmas gifts, Halloween gifts, children39;s birthday surprises, and jigsaw puzzles, giving children a happy entertainment time 4. Our Domino Train Blocks Set can develop children39;s athletic ability, color cognitive ability, teamwork ability. Colorful and beautiful appearance can stimulate their brain and thought development. 5. Can develop children39;s hands-on ability, color cognitive, artistic cognition, sensory, cognitive ability, imagination, and creativity. Notice: *Actual color may be slightly different from the image due to different monitor and light effect *Please allow 1-3cm deviation due to manual measurement Description: Size: As the picture shown Battery: 1 x AA Battery not include Package List: 1 set x Domino Train Blocks Set