Use a truck to dump the subtracted ballsWith this toy, children can enjoy playing with a wheeled object while also learning numeral values and the power of subtraction. This phenomenon is fascinating and yet simplified in the form of a dump truck that clearly shows the child that to subtract is to remove or 'take away'. Children are fascinated with what is 'leftover' in the truck, thus completing the process of subtraction.Set includes a dump truck, a receiving tube, a set of 10 wooden painted balls, and 2 wooden tokens to block the balls at various points. Size of Truck: 33 cm x 11 cm x 11.5 cm heightOnce children have learned addition and subtraction using physical objects, they are ready to understand both the operations from a positional standpoint using a number line