Wedding Thankyou Possibilities

I am trying to come up with some Thank you idea's for our son's wedding....I am still plugging away at idea's....this was only the beginning...I now have their photo, copied it, and trying to do something with it!...it wasn't this difficult when I was married many moons ago....we had "thank you" cards that came with the invites....plain and simple!!...today, we want to reinvent the wheel, and come up with something unique...lol...if I keep stalling, a simple handshake, will be as unique as I get....haha....they don't know I'm doing anything...good thing!!smiles