You might not think you're using a simple machine when you zip up your coat, but it's true! <em>Simple Machines! With 25 Science Projects for Kids</em> introduces readers ages 7 to 10 to the six simple machines recognized as crucial to human civilization: planes, pulleys, screws, wedges, and wheels and axles. Hands-on science projects, essential questions, links to primary sources, and more get kids excited about STEM learning!
