It's going to be a busy day on the building site. Digger needs to dig a hole so the foundations can be laid. There's earth to dig up and rubble to clear. Things are looking good - then there's an emergency phone call. Digger needs to attend a rescue, but will he arrive in time to be a hero? It's time to get busy with machines that roar, whizz, vroom, and zoom! The stories feature a popular vehicle as the central character, and involve a group of animal characters in a supporting role. A detailed spread on different parts of the vehicle will help children understand what makes up the machines and will help familiarize them with vehicle vocabulary.