   nerf (trademarked in capitals as nerf) is a toy brand created by parker brothers and currently owned by hasbro. most of the toys are a variety of foam-based weaponry, but there are also several different types of nerf toys, such as balls for sports like football, basketball, baseball, and others. the most notable of the toys are the dart guns (referred to by hasbro as "blasters") that shoot ammunition made from nerf foam. since many such items were released throughout the 1970s, nerf products often feature bright neon colors and soft textures similar to the flagship nerf ball. the slogan, which has been frequently used since advertising in the 1990s, is "it's nerf or nothin'!". ==nerf material== nerf foam (non-expanding recreational foam) is made from a solid, spongy cellular material. to produce it, polyester resin reacts with another compound in the presence of co2 from another reaction. it is this gas that creates open pockets within the polyurethane that, in turn, make the material soft and light. ==history== thumb|right|original nerf (styled nerf) logo (1969-1990) parker brothers originally developed nerf, beginning with a four-inch (102&nbsp;mm) polyurethane foam ball. in 1969, reyn guyer, a minnesota-based games inventor, came to the company with a volleyball game that was safe for indoor play, and after studying it carefully, parker brothers decided to eliminate everything but the foam ball. in 1970, the nerf ball was introduced as the "world's first official indoor ball", the name "nerf" being a slang term for the foam padding used in off-road racing.{{cite web |title=nerf 1968 |publisher=reyn guyer creative group |url=http://reynguyercreativegroup.com/?page_id=12&cat_id=5 |accessdate=january 6, 2013 |quote=parker brothers decided to name the balls nerf after the 
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