Rory Stokes proved the 3 second myth wrong at only 15 years old. He knew better than to believe everything he heard, and so he conducted an experiment. He put a red Lego block in his goldfish's tank every time he fed it. It only took three weeks before the fish caught on and started to swim to the Lego block looking for food. He stopped using the Lego block, but a week later the fish still knew that the block meant food!