Busy machines for busy kids!"Diggers are good at dig, dig, digging,scooping up the earth and lifting and tipping.They make huge holes with their dig, dig, digging.They can work all day."Trucks and tractors, fire engines and helicopters-they all like to work hard. But after a long, happy day of beep-beeping and vroom-vrooming, even the busiest engines need to rest. This bright, bouncy, noise-filled book brings together all the vehicles that children adore.