Build early computational skills with this visual model that helps kids discover number relationships and develop addition and subtraction strategies. Standard red and white colored beads, in 5-bead groupings, slide along the wires to help kids make mental images of numbers. Includes 2 rows of 10 beads (5 red and 5 white in each row). Measures 9" L x 2¾" W x 3" H. Activity Guide included.