Sure, toys are fun to play with, but they can be educational, too! In the How Toys Work Book Set, children will explore the process that goes into making a majority of their toys. This book set includes 6 books that focus on topics such as levers, pulleys, ramps and wedges, screws, nuts, and bolts, springs, wheels, and axels. These books are perfect for use in coordination with a STEM lesson. Each book in this book set is recommended for grades Pre-K+.