Young children will love moving the sliders to make the circus animals do tricks and reveal the answers to simple sums. Counting the animals on the page, then moving the slider to add one more, shows how addition works in a simple yet entertaining way. A delightful book that children will return to again and again. Young children will love moving the sliders to make the circus animals do tricks and reveal the answers to simple sums. Counting the animals on the page, then moving the slider to add one more, shows how addition works in a simple yet entertaining way. A delightful book that children will return to again and again. What's in the box 1x book