3 years & up. The Wooden Math Number Tiles Educational Toy is the perfect STEM toy for teaching children addition and subtraction. Playset comes with training board and 110 math equation pieces for fun learning play. Calculation board includes math tiles that allow you to make equations with the numbers 1 through 20. Improve math and fine motor skills at the same time. Training board measures 15.2" x 9.3" x 2.4".