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, children's birthday surprises, and jigsaw puzzles, giving children a happy entertainment time 4. Our Domino Train Blocks Set can develop children's athletic ability, color cognitive ability, teamwork ability. Colorful and beautiful appearance can stimulate their brain and thought development. 5.Can develop children'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 : Size: As the picture shown Battery: 1 x AA Battery (not include) includes: 1 set x Domino Train Blocks Set