Four children learn about fractions when they wish on a star and only get partial wish fulfillments. Four-year-old Petey and his two-year-old brother, Joey, make the first wishes on the star, asking for a dollar. Sally, eight, thinks they are both goofy, but the next morning Petey is a quarter richer. He wishes again, while Joey asks for a cookie. Petey receives another quarter and Joey gets half a cookie. At this point, Sally and her twin Samantha get in on the wishing. But each receives only an eighth of their wish. Putting their heads together, they determine that their ages are the key, and that if they all wish for the same thing, they can get one whole. And what a wish it is! Currey’s watercolor illustrations capture the wonder and puzzlement in the children’s faces as they ponder their wishing star. She visually presents the fractional parts, as well as the number of parts required to make a whole, and adds the fractional notation. The kids’ clever way of testing their math will have teachers applauding, as will the amazing mind-stretching follow-up page, which gives readers some thought-provoking questions to further explore the concepts presented in the book. A clever concept done well. (Picture book. 5-9)