This counting book, its tribal rhythm pounding through its rhyming, typographic lines, is truly aerobics on the page. In her first book, Parker takes a funny concept and executes it flawlessly. After a bear turns on his boom box, ``With a fizzle in their fingers and a tingle in their toes, two hoppin' kangaroos know how Bearobics goes. Three giggling gorillas now get into the groove. Bopping and shoowapping. Just watch them as they move!'' Bolam's bright, flat illustrations fit the manic mood perfectly. Kids will love the irresistible movement of the words--and the invitation to join in for the count, which progresses (in one particular leap) to a million ants. Frenetic and fun. (Picture book. 3-8)
