Giant Metal Spring - 3.75 inch diameter

This metal coil spring is ideal for visually demonstrating wave properties, such as frequency, wavelength, and interference both in the classroom and at home.  It's also a classic novelty toy bringing joy to all ages and generations.  Its famous for its propensity for 'walking' down staircases; just place one end of the coil on two different stair steps, and watch as the coil springs its way down the steps.

Features:

• Metal coil perfect for classroom demonstrations of wave properties
• Great for many experiments, hands-on, a student favorite
• Novelty toy famous for entertaining kids of all ages
• Performs tricks!  Watch it 'walk' down a staircase