Build this domino-stacking robot car and you’ll never have to stack dominos again! Dominobot sets up its dominos perfectly each time. Then you get to knock them down and start all over again! Includes all required materials (including 42 plastic dominoes) and detailed instructions. Measures 6.5″L x 3″W x 1.5″H when fully assembled. Requires 2 AAA batteries (not included).