Read the 1975 owner's manual for the Pet Rock

Advertising copywriter Gary Dahl was drinking with his friends at a bar in Los Gatos, California in April 1975 when he came up with the idea of selling rocks as low-maintenance pets.

The care and training of your pet rock (1975)

Advertising copywriter Gary Dahl was drinking with his friends at a bar in Los Gatos, California in April 1975 when he came up with the idea of selling rocks as low-maintenance pets.