Here's a pretty easy DIY that I tackled a few weeks ago.
If you've ever done any international travel you know that you can end up with a lot of extra coins (the paper money you can cash out at the bank, but the coins, well you are stuck until you or someone you know makes a return trip). Well, we had a bunch of coins from various places stuffed in a jar, so I culled through them to find the prettiest/shiniest/most interesting. I then trucked off to Michael's and picked up some round magnets (I got two sizes, since I had some small and larger coins) and some glue that works on metal. Then all I did was glue the magnets on the backs of the coins, let them dry and then they were ready for hanging stuff on the refrigerator!
It is such a quick and easy project and everyone who sees them loves how they look! Plus, the coins aren't just hanging around the house as clutter, they are useful souvenirs! Win - win!!