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  • MyAnacondaDoes
    +4

    Hands down, pet rocks. It's a rock with just googly eyes on it, in a box. 15 million dollar idea, right here.

    • Boudicca
      +3

      As soon as I saw the title- Pet Rocks came to mind what a brilliantly simple idea.

      The other one was Sea Monkeys-a marketing stroke of genius that bitterly disappointed a generation of kids