A funny little series of PSAs created by Children's Hospital of Pittsburgh, to clearly label poisonous and toxic chemicals so tots don't drink it.
"When you see it, you'll know quick! Things marked Yuk make you sick! Sick sick sick! SICK SICK SICK!" It's a prime example of '70s surrealism, with what sounds like sound effects from an arcade game leading it off. (Yes, they had them in 1970.)
More about Mr. Yuk here. It's high time we made a meme out of it and ran it into the ground.