Any Craigslist aficionado will tell you that the free stuff section is full of a surprising number of pianos, completely up for grabs. A lot of these are old and unplayable, but you can give them new life with DIY projects like this one. For more DIY piano ideas, click here.
You can use these as centerpieces for your wedding reception, or to spruce up your shelves. If you're like me and a heart is too sentimental for you (ewww, feelings) you could cut out a star shape instead.