For information about nerf as used in computer gaming, see nerf (computer gaming).

Nerf is a foam-plastic material used in childsafe toys.

Originally introduced in 1969 as an indoor-safe ball by Parker Brothers, it was an instant fad. Sales of the balls mounting to four million in the year of their inception.

Later, the range of nerf products expanded to include mock weapons made out of nerf, such as nerf-crossbows, nerf-javelins, nerf dart-guns, etc.