I love the idea of giving your parents a gifts at the rehearsal dinner (: the bride and the groom take a special moment to honor their parents and give them a gift! (this is a perfect gift for one of the Mom's)
Remember: Doing Nice Things for your family is just as good as for strangers. Don't tell them about it- just leave it for them to find. A sweet loving message or a thank you or an encouragement. Any kind word is good. The Art of the Surprise Note .