Montessori math board for kids - math game for learning counting and addition and subtraction of numbers up to 20. This wooden set includes: - oak reversible board. - 20 two-sided(reversible) cards with numbers from 1 to 20, and cards with , +,-,=. - 22 handmade felt balls. How you can play with kids ? Put card with number to tray and child must put as many balls into the holes what number is shown on the cards. In this way the child will learn numbers and learn how to count. This board is reversible(two-sided), on the back of the board are trays with plus and minus for simple math tasks. You can create various tasks with addition and subtraction, using balls and number cards. Made from oak. Finished with natural oil. SIZE Board: Width- 20cm, length - 20 cm(7.9*7.9 inches). Thickness -1.8 cm (0.7 ") Each card 3,5*4 cm (or 1.4*1.6 inches). Felt balls approx. 1,5 cm or 0.59 inches. The size may deviate slightly because the balls are handmade. 72360.3532 Listing and template services provided by inkFrog