Moon Pie Indoor/Outdoor Thermometer WORKS WHEN IT'S HOT, AND WHEN IT'S NOT Remember when Moon Pies were only 5 cents? Well, probably not, but this nostalgic 17-inch high thermometer depicts a time when these delectable Southern treats only cost a nickel. The Moon Pie has been tickling our taste buds since 1917. Don't forget to wash it down with an RC Cola!