When Gary Dahl first introduced the Pet Rock, it excited and confused customers. By the time the interest wore off, selling rocks in a box had made one man a ...
How Pet Rocks Made A Fortune For One Man | Flashback | NBC News
Gary Dahl, the man who became a millionaire by selling ordinary rocks, died on March 23 at the age of 78. Dahl, an advertising copywriter, thought up the Pet ...
Gary Dahl, Inventor of the Pet Rock, Dies at 78
From hair wigs made for dogs to billy-bob teeth and pet rocks we count 20 weird inventions that made millions of dollars. Click Here To Subscribe!
20 Weird Inventions That Made Millions of Dollars