I saw a joke about the Iron lung coupons in Mad or cracked or some other satire magazine many years ago.

The whole "free" item in junk food has always amused me.

When I was a kid I guess a box of sugary cereal cost about 50 cents. A hundred little plastic toys in a bag cost about the same.

My parents could have saved a fortune by buying a bag of toys and giving me one every time they opened a bag of oatmeal.