Here is a quick idea for place cards that are super easy to assemble and don't cost too much. All you need are candles and letter brads (these are little two-pronged fasteners that are used for scrapbooking). Here are some brads that I found at a craft store:
To assemble the place card, simply insert the brad into the side of the candle to form the guest's name and light it - you're done!
Told you they were easy to make...enjoy!