Guess what kind of truck is at work in this interactive book by the bestselling creators of Roadworks, packaged with a plastic excavator that rolls and moves. Crash-a-rumble Smash-a-grumble What's at work? Here's a clue: It will clear the ground for you. Bulldozer! Coming through! This is the follow-up to Roadworks that will delight tiny truck enthusiasts. It's an engaging, interactive text that asks readers to guess what kind of vehicle is at work. Visual clues alongside the text help ensure that our readers are challenged but can still be successful with their guesses. In the end, the vehicles work together to build a surprise.