Description Learn about how Simple machines enable practically everything around us to work.
Simple machines are around u.
Each book features full-color cartoon-style illustrations and hilarious speech bubbles to heighten interest, making the series attractive even to reluctant readers.
This series takes readers (Ages 8-12) on a historical journey, examining how people coped in the past and how they developed ingenious ways to make life safer and less unpleasant.
Description Learn about how Simple machines enable practically everything around us to work