Nerf is a toy brand formed by Parker Brothers and currently owned by Hasbro. Most of the toys are a variety of foam-based weaponry, with other Nerf products including balls for sports such as American football, basketball, and baseball. Their best known toys are their dart guns (referred to by Hasbro as "blasters") that shoot ammunition made from "Nerf foam" (partially reticulated polyether type polyurethane foam). Their primary slogan, first introduced in the 1990s, is "It's Nerf or Nothin'!". Annual revenues under the Nerf brand are approximately . History Parker Brothers originally developed Nerf, beginning with a polyurethane foam ball. In 1969, Reyn Guyer, a Minnesota-based games inventor, and Minnesota Vikings kicker Fred Cox came to the company with a football 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-roading. Marketing slogans promised that one can "Throw it indoors; you can't damage lamps or break windows. You can't hurt babies or old people." Some of the first TV commercials for the balls were joint promotions with General Foods' Kool-Aid drink mix, with Micky Dolenz, Davy Jones and Michael Nesmith of the Monkees playing with the balls on a living room soundstage (Kool-Aid sponsored the 1969–70 Saturday morning reruns of the Monkees' 1966–67 TV series). The ball filled a strong consumer need and by the year's end, more than four million Nerf balls had been sold. The ball was followed by a large version called the "Super Nerf Ball". Shortly after, in 1972, a basketball game called "Nerfoop" and the Nerf football (developed by longtime NFL kicker Fred Cox) joined the family, with the latter quickly becoming Nerf's most popular ball. The company continued to add to the Nerf line until they handed control to Kenner Products, a sister company. In 1987, Kenner was bought by the Tonka Corporation, which itself was purchased by Hasbro in 1991, which then became the owner of Nerf. Throughout the 1990s and early 2000s, the Nerf brand served under the subsidiaries OddzOn and Larami before Hasbro took full control of the brand. Over the years, Nerf has continued to expand the line, adding new looks to existing products, with later lines of Nerf products