3 years & up. Each tile in this Magna-Tiles® Structures set is double-sided with alphabet letters on one side and a schoolhouse to build on the other. Your child will learn letters, sounds, words and much more. Then flip the tiles to build a school that they will have fun with for hours. This set contains 1 six-inch square tile, 26 three-inch square tiles, 8 equilateral triangle tiles, and 2 door tiles. All pieces are printed two-sided and feature SuperColor® technology on both sides.