Slider Sound Books: Rummble! [Book]

Move the sliders back and forth in this unique sound book to hear the building site come to life. From noisy diggers and clanking cranes to forklift trucks and road-rollers, the charmingly illustrated scenes are full of busy vehicles. Each slider has two different sounds on it - move it one way to see and hear one vehicle, then move it back again to hear a different one.