3 years & up. Your little one can have fun with his or her very own Magna-Tiles® Structures bus! The front of the tiles have all the tiles needed to build the bus. Side two includes numbers 0-9, plus sign, minus sign, greater than/less than sign and an equal sign, so your child can learn numbers and basic math skills. Set contains 18 three-inch square tiles and 2 wheeled chassis. All pieces are printed two-sided and feature SuperColor® technology on both sides.