Get young thinkers in Grades K to 3 wired and inspired for STEAM learning with the Frey Scientific Simple Machines Books! This fun and educational series will open your elementary readers’ eyes to the essential, everyday simple machines in the world. Easy-to-follow text, colorful diagrams, and more will engage your kids to learn more about how levers, wheels and axles, inclined planes, pulleys, wedges, and screws work. Glossary and index included for each book. Set includes 6 softcover paperback books total (each with 32 pages). Designed for Grade Level 2; interest level Grades K to 3.