(Pittsburgh, Pa.) 50 years ago this week a major contributor in the fight against children and poisons was first introduced to the world. Back in 1971, Doctor Richard Moriarty created a green sticker for people to place on their dangerous household products with a yucky face on it to deter children from getting into poisons.

If it scared you as a kid, that was the point. Moriarty showed the sticker to kids to get their opinion one of whom said, “That looks yucky.” and so Mr. Yuk was born.

The doctor also founded the Pittsburgh Poison Center Network in 1973.