Teach children how to visualize numbers up to 100. This calculating tool provides young learners with the visual model they need to discover number relationships and develop addition and subtraction strategies. Red and white colored beads allow kids to make mental images of numbers for counting, adding, subtracting, and more. Includes 10 rows of 10 beads (5 red and 5 white in each row). Measures 9" L x 4" W x 8.75" H. Activity Guide included.