Leftover foreign currency -- whether it’s Japanese yen or Mexican pesos or Canadian dollars -- doesn't have to live stashed away in a junk drawer. Collect all of your foreign currency and donate it to UNICEF. Its Change for Good program takes your foreign currency and uses it to fund programs to support children all over the world who do not have access to education, food and clean water. Send your money to U.S. Fund for UNICEF, Attn: Change for Good Program, 125 Maiden Lane, New York, N.Y., 10038. Be sure to include your name, address and email so the organization can send you a receipt for your donation for tax purposes.