David Armentrout

The perfect introduction to being a pet owner for the child ready to get a bunny.

The perfect introduction to being a pet owner for the child ready to get a hermit crab.

In this series, you'll explore six simple machines. Each book describes a different one and explains how it helps make our work easier. Experiments and activities give you the chance to work with each simple machine. You'll be surprised at how many you've been using all along! - Back cover.