Gift for Couple that is doing a reading at our wedding??

Danielle and I have no idea as to what to get them. The people that are doing the reading are like a second family to Danielle. She has grown up with their family. She has been best friends with their daughter since they were both younger, and they are still great friends. Their daughter is actually one of her MOH's.

What do we get them as a gift for doing the readings....Does anyone have any ideas?
Thanks,
Scott