Hear that? It's the sound of some AWESOME monster trucks! Enjoy all the fun of Monster Jam in this board book with 10 revving sound buttons! Get ready to rev your engines and dive into the world of Monster Jam! From Grave Digger to Sparkle Smash, buckle up for an awesome adventure through the coolest trucks around! This book is packed with 10 roaring sounds that bring the excitement of Monster Jam right to you. Perfect for all monster-truck fans!.