Napkin as bow tie. How cute would this be for a wedding - especially if you did place card seating! turn it the other way, and tuck in a flower or tie it with bow.if you tie it higher, it might look like a dress!
I have also seen similar centerpieces that use epsom salts instead of sugar. You could also sprinkle a mix of pearls/gems. Sand (or sugar), faux pearls, a 3 candle. An easy DIY wedding centerpiece idea.