Wonderworld Counting Ball
A new concept in mathematical learning is now available with the Wonderworld Counting Ball Manual Numbers Discovery Set. The Wonderworld Counting Ball Manual Numbers Discovery Set is a toy that encourages learning the dynamics of subtraction and addition through the use of five colored balls, a knob and a lever. Equipped with an upper and lower level, the Wonderworld Counting Ball Manual Numbers Discovery Set works by either hitting the lever to bring a ball up to add to the upper level or twisting the knob to subtract and bring a ball down to the lower level. The Wonderworld Counting Ball Manual Numbers Discovery Set opens the door to learning with a fun and exciting process that is sure to keep your child entertained for hours.