These engaging boards help kids develop essential math skills—from addition and subtraction to comparing numbers! Children simply choose a problem card…stick cupcake, apple or flower magnets representing groups of “tens” and “ones” on the board to visualize quantities…and then solve each problem. After, they flip the card over to check their answer! Each board includes 30-32 magnets and 30 self-checking cards. Complete set comes with all 3 boards shown. Boards measure 9" x 12". Each board also available separately below.