coin-op or waxing-nostalgic

Do you remember these?

I can distinctively recall summoning up some aquamarine elephant with a Mold-A-Rama vending machine at the zoo in Oklahoma City as a little kid. One could choose from a whole variety of souvenir animals and even dinosaurs, hot from the extruder. At the link, watch one at work from a recent visit to the animal-park in San Antonio.  Three-dimensional printing is potentially revolutionary but maybe nothing particularly new or novel in application, considering the mania introduced in 1962 and with these free-standing legacy machines still in action at zoos and other venues across America.