Mighty excavators and powerful dump trucks--young children's favorite earth-moving machines are all here in superb full-color photos. Why does a bulldozer have catapillar tracks? What machines are used to build roads and tunnels? Simple text and detailed illustrations will satisfy curious preschoolers who are busy learning about their world.

 

There are 21 pages in this book. This is a picture book. A picture book uses pictures and text to tell the story. The number of words varies from zero ('wordless') to around 1k over 32 pages. Picture books are typically aimed at young readers (age 3-6) but can also be aimed at older children (7+). This book was published 1991 by Simon & Schuster .

Angela Royston has written and edited many books for children about science and nature.