Screws (Simple Machines) (Little Pebble: Simple Machines)

Screws (Understanding Simple Machines) - Library Binding - VERY GOOD

Simple Machines - Paperback By Evan Moor - VERY GOOD

Screws (Simple Machines), Rustad, Martha E H

Pulleys in Action (Simple Machines at Work) - Paperback - VERY GOOD

Simple Machines (Starting with Science) - Paperback - VERY GOOD

Hands-on Science: Simple Machines (Hands-on Physical Science - VERY GOOD

Simple Machines (Rookie Read-About Science (Paperback)) - Paperback - GOOD