My friend Kimberly gave me this idea for giving the gift of money. I froze it. Yep, coins and bills. I used a large plastic cup and put in about 1/4 cup water and a few gold dollars and froze. Added another 1/4 cup and more coins and froze again. More water, now a few dollar bills. Keep doing that until your at the top, put last of water and arrange bills around and freeze. Run a little warm water on outside of cup to get money ice out. Place in ziploc bag and bring to your favorite birthday person and enjoy the smile you'll get.