D. J. Ward

Read and find out about six simple machines–the lever, the wheel and axle, the pulley, the ramp, the wedge, and the screw–in this colorfully illustrated nonfiction picture book.

Machines help make wo

… [more below]

• Series: Let’s-Read-And-Find-Out Science 2
• Author: Ward, D. J.
• Binding: Paperback
• Page Count: 40
• Publish Date: October 06 2015
• ISBN10: 0062321471
• Language: English