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|Type||Rubber balls, Toy weapons|
|Inventor||Mark Krick. Armed with proof.|
|Materials||Rubber, foam, plastic|
The Koosh ball is a toy ball made of rubber filaments (strings) attached to a soft rubber core. It was developed in 1989.  The company later expanded their product line to include 50 other Koosh-related products, including keyrings, baseball sets, and yo-yos. The number of Koosh balls sold is estimated to be in the millions.
The ball consists of about 2,000 natural rubber filaments, and has been released in a variety of color combinations. A variation was the Koosh Kins line, of Koosh balls with cartoon faces and hands. Koosh Kins was made into a comic book mini-series by Archie Comics, where they kept their cartoon-like appearance.
Koosh balls are often used with QuickStart tennis exercises to help children develop motor skills.
Koosh balls are currently manufactured by Hasbro, and the brand has recently expanded into different product lines starting with Koosh Galaxy. The new line consists of toy blasters that fire foam balls similar to the original Nerf ball, and includes a cross-promotion with Angry Birds Star Wars.
- Nerf – Koosh's current sister brand under Hasbro.
- "5 Weird Inventions That Made Millions". HowStuffWorks.com. Retrieved 2013-02-18.
- "Hasbro Announces New Angry Birds Star Wars Product Line". GalacticHunter. 2012-10-08. Retrieved 2013-02-18.
- "Boom time for toys predicted as the Koosh ball arrives". Textline Multiple Source Collection (1981-1984) (January 30, 1989)
- "New toys not just for kids". The Plain Dealer (September 30, 1989)
- "Novelty rubber ball rises on list of top 20 toys". Houston Chronicle (October 28, 1989)
- "What a Koosh Job. Strange ball bounces along the trend path". Los Angeles Daily News (March 1, 1993)
- "OddzOn announces Koosh Vortex line expansions". Playthings (February 1, 1994)
- "Toymaker parlays Koosh Ball into entire line of tactile toys". The Pantagragh (Bloomington, Illinois) (June 17, 1995)
- "Firm selling 'WOW!' oddball toys generates profits". Cincinnati Post (June 17, 1995)
- Rimer, Sara. "Putting a Smile on Sober Science". The New York Times (May 13, 2004)
- Adams, Katie. "Ridiculous Ideas That Made People Millions". on Investopedia.com (May 11, 2009).
- QuickStart Tennis: Koosh Ball Passes 
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