These are some of the best mouth theories I have seen on toys.
Some pretty appealing eyes too.
We used to get these toys for free in Colgate toothpaste and Lipton's Tea. The tea would stain your teeth and the toothpaste would clean the stains. These tiny little toys would reward the never ending cycle of tooth destruction and renewal.
They also sometimes sold huge bags stuffed full of Teeny Tinykins from every cartoon studio. I'd swear there was a commercial for that too, but can't find it anywhere.