Numbers have a definite shape and a definite size when you look at them, but in the blink of an eye they can do the unexpected. That's when they become Numblers. With a shimmer and a stretch, each number becomes part of a picture, displaying qualities you'd think it would have and ones you'd never imagine. You'd expect a picture made up of fives to have five parts.. But would you expect it to become a train? You'd expect a "three" picture to have three parts, but would you expect a frog? Each of these transformations gives the readers a surprise, plus the challenge of counting up the parts. It takes a spirit of adventure and a big imagination to keep up with these Numblers, but if you need any help, there's a key at the back!