Readers don't need a driver's license and there's no speed limit in Drive Your Tractor and Drive Your Car, both by Anna Nilsen, with sunny illustrations by Tony Wells. A clear plastic pocket on the cover of each volume holds a tiny paper version of the eponymous vehicle, and that's only the beginning of the fun. Inside, horizontally split pages feature looping roads (paved for the car, dirt for the tractor) that, with a turn of either half page, the reader can follow round and about the town or the farmyard. And there's plenty to see along both routes: scarecrows, piglets, barns and ponds; playgrounds, toystores, gas stations and pedestrians (look out!).