Simple Machines Screw Infant/Toddler Create your own bulletin board

Create your own bulletin board by adding fiberboard backing and a frame

These painting sponges are strong

four plastic cups

• Amplification that's perfect for classrooms

This Polka Dots on Wood EZ Border offers a fresh take on a classic design

Simple Machines Screw Infant/Toddler Create your own bulletin boardThe screw, another of the simple machines, converts a circular motion (the turning of the screw) into a linear motion. It also lets you amplify the force a great deal, since turning the screw only moves the end of the screw a small amount. This classic wooden model offers children a basic concept of the laws of physics. Desktop sized. Recommended age 9+ years