Since 1987, the UNICEF program Change for Good has raised more than $120 million through the collection of leftover foreign currency on international flights and at airports and airport lounges around the world. If you have a collection of unwanted foreign currency, collect it and bring it with you the next time you fly. Any American Airlines Admirals Club Lounge will accept your spare change for the program, regardless of whether you are a member. All of the funds raised are used to help children in need. Learn more at unicef.org.