money Tree by IhrStyle on Etsy, €36.00
A Penny Desk... a great idea for countertops, floors, or furniture. www.homeroad.net
Coin Art - take your foreign coins you collect from your travels and mount inside store bought picture frames!
Reverse of 1959-D One Cent - Wheat Ears on Reverse Now days people don't even want pennies.
while de-facing currency isn't acceptable i do think a tray like this would be a great way to use our collection of foreign coins
Turning Stones Blog: Coin Art displaying foreign money
Electromagnetically Shrunken Quarters