UNIQUE AUTOMATIC LAYING FUNCTION: Fill the plastic blocks and start the train to lay your domino trail that add more drama to the domino racing game. Need uses 2AA Size Batteries (not included) Please use low-energy batteries, such as "R6P,1.5V" batteries.ENDLESS DOMINO RACING FUN: Build your desired domino race track with 80 pieces of colorful plastic blocks. Super fun for your kids to play Set them up all in a row, and then push one and watch the chain effect of the dominoes tumbling over like a race.ENCOURAGES STEM DEVELOPMENT: Designed to engage kids in their early development, the Dominoes encourages childrens spatial thinking abilities, color recognition and will keep your little engineers coming back for more funPERFECT GIFT FOR BOYS AND GIRL:These plastic Blocks domino pieces are finished with non-toxic paints which are safe and wont fade. The dominos are made of high-quality plastic, Smooth edges to ensure children's safety during play. 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