The Hula Hoop. The pogo stick. The Tamagotchi.
Fads, crazes and must-have toys all sweep the country from time to time. But in the annals of faddish toys, one achievement stands tall — or rather, sits small: the Pet Rock.
It was exactly what it sounds like: a rock (a Mexican beach stone, to be precise) marketed in the mid-'70s as a pet. Each came in its own box with air holes and a detailed owner's manual.