Manipulate visual representations of place value, operations, fractions, decimals, percents and more. A great way for children to learn basic mathematics in a playful format that is much less intimidating than a pencil and paper. Set comes with four sheets of base ten wholes, tens and single units. Includes 2 flats, 20 rods and 40 units. Each flat is 4.13"L x 3.75"W. Ages 6+/Grades 1+