Children's Books on Heavy Machinery

Trucks (National Geographic Kids Readers, Level 1)

Little First Stickers Diggers and Cranes: An Entertaining Sticker Activity Book About Construction for Children (Ages 3-5)

I Am a Dump Truck

Tractors (Big Machines at Work)

Hello, World! Construction Site

Tractor Coloring Book: Farm Vehicles And Tractors In Farming Life Scenes, Gift For Kids And Toddlers

Construye: Rascacielos

The Way Things Work Now