Ages 6 to 10 years. Construction vehicles are tough machines that have many different jobs at construction sites. Cool Construction Vehicles uses big images and clear text to introduce kids to the common vehicles used at construction sites and the important jobs they do. In this fun book, kids will learn about: some common construction vehicle parts, such as wheels and tracks; dump trucks and diggers; how construction vehicles are used to make roads; front-end loaders, concrete mixers, and mobile cranes.