Get ready to moo, baa, and beep with the #1 New York Times bestselling Little Blue Truck in this interactive sound book! The friendly Little Blue Truck beeps hello to all of his animal friends in this all-new, original story. How will each of his friends say hello back? Do they beep like Blue--or will they say something new? Come along for the ride and enjoy learning about animal noises with eight sound buttons and loads...