The world is filled with numbers. From learning to count their fingers to learning to put on their shoes, children encounter mathematical concepts early in life. Steve Swinburne introduces children to number-related words in this bouncy, colorful photo-essay. From one to a dozen, lively photographs illustrated math words such as single, double, couple, and prefixes such as uni-, bi-, and tri-. The second half of the book is presented as a guessing game. Following Lots and Lots of Zebra Stripes and Guess Whose Shadow?, Steve Swinburne offers children another entertaining look at an all-important concept.