Evan and his younger sister, Jessie, react very differently to the news that they will be in the same class for fourth grade and as the end of summer approaches, they battle it out through lemonade stands, each trying to be the first to earn 100 dollars. Includes mathematical calculations and tips for running a successful lemonade stand.

Simple arithmetical equations show how big and small moments add up in life.

One by one, ten flowers ask a fairy to turn them into butterflies for a night of magical flying, demonstrating to readers the different ways to group numbers to create ten.

A boy awakens to find that everything around him is odd, from three sleeves on his shirt and five legs on his dog to clocks and calendars with only odd numbers. Includes a three-page "For Creative Minds" section with odd fun facts and number games.

When George's mother asks him to add one plus one, two plus two, and three plus three, George would rather eat, go for a walk, and take a nap. But soon George finds himself in a colorful dream about . . . numbers!