A series of rhymes illustrates different ways to count to 100 such as by adding the ten toes of ten children or ninety-nine train cars plus one caboose.

Three friends play hide-and-seek, varying the way they count to 100 in each game: by ones, fives, tens, and twenties. Includes related activities.

This lively series of concept books is designed to encourage young children to take a closer look at the world around them. Each book explores a different theme and invites children to carry out investigations and experiments of their own.

Illustrated riddles introduce strategies for solving a variety of math problems in using visual clues.

The same number can seem bigger or smaller depending on the size, arrangement and use of the objects being counted.

"A look at the numbers that surround us, big and small, on earth and in outer space."--Provided by publisher.

While trying to save enough money to buy a new ice scooter, Perry the Penguin learns about managing his money and about negative numbers.