Spring Toy

Splashery stretches a drumhead over this Splash's outline, twelve inches across, and finds the ways it can ring. Its lowest is 579.6 Hz, 123 cents flat of E♭5, the nearest tine on the comb. The next fifteen are its overtones, and each one draws its own figure: sand gathers on the lines that stay still.

Pull its top coils up or sideways; let go and it springs back. Tap to hurry it along.

A spring toy is a long, loose coil of metal or plastic that can walk down stairs by itself. Set one end on a lower step and it flips over, end over end, as each coil tips across in turn and the weight moves from one end to the other. It was invented in the 1940s by an engineer who saw a spring fall off a shelf and keep moving.

This one walks by itself, its coils flipping over from one side to the other. Pull its top coils up or to the side and it gathers into a stack and stretches out, coil by coil; let go and it springs back down and wobbles, then walks on. Tap it to hurry it along. Pick a rainbow, metal or pastel coil in the Splash tab.

This link opens it in the Playground. To put it on your own page, add the element and one script tag. Every option.