Riddle: Joan is both a collector and a trader. She has spent most of her adult life collecting and trading tiny, green keys. Joan, along with millions of Americans living today, love to see how many of these little keys they can gather; but they also like to trade them away for a wide variety of items including food, toys, furniture, services, boats, and even houses. Some people have even committed murder to possess these keys! Joan usually carries a supply of these little, green keys with her in her purse in case of emergency. Joan feels certain these keys will never rust, but she always tries to keep them as dry as possible. What exactly are these little green keys, and why do people seek them with such passion?
Answer: On the front side of each bill of paper money, a green seal is seen. Near the bottom of the green seal, a tiny green key is always found. Thus, whenever people spend, receive, or steal money, they are also exchanging these little green keys. Take some time to study your money more closely, and you will find a small weighing scale pictured in the same green seal just above the little green key. There are other interesting things to find on your money. A magnifying glass may be helpful in this endeavor.