Take your imagination to the moon with ZipString Luma. It's the ultimate glow-in-the-dark toy that balances forces of gravity, lift, tension, and drag to fly a looped string in the air for amazing tricks!

The String is Flying!

A ZipString is an incredible device that rapidly propels, a loop of string. When the strings momentum is balanced within the forces of gravity, lift, and drag, the string actually flies.

Included with ZipString

3 String loops of different sizes and colors
USB charging cable
Instruction guide
QR code to trick library

Learn Tricks!

Bow & Arrow
The CorkScrew
Zip Fish'n
The Scribble
Spray
Switcheroo
Gymnastics
The Swirl
Richard's Mess
Cartwheels
Lazy Mountain
Spin the Pen
The Portal
The Portal Dive
Step Through
The Infinity Bow
...and many more!!

More About ZipString

The momentum of the string is derived from its speed and its mass. Optimal strings are moving fast, and the string is made light.

In a ZipString, the string is moving at about 35 miles or 65 Kilometers per hour. And the string is made from very light fibers.

Another important feature is the fact that the string in the ZipString isn’t smooth. This is critical to help the string fly. When we look closely, we can see that the string has lots of small filaments that radiate outward. As these filaments move through the air, they create drag. So much so in fact, when you put your hand near the string, you can feel the air movement.

Technically, the string is always under tension. Since the string is a loop, as the string is propelled out of the device, it eventually has to return. As the string begins its return, gravity pulls it downward, but because of the speed of the string, and the drag from the filaments around the string, it creates lift. This lift is mostly pronounced at the distal end, the end farthest from the device. When there’s more lift than the actual weight of the string, the string begins to fly. Another interesting observation is that because of the opposing forces of gravity and lift on the loop of string, the string always orients itself vertically.

So the key to ZipString is moving a light fuzzy string through the air fast enough that it creates enough lift to overcome its weight. When that happens the string is flying.

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