Wedding party gift for grandparents?

We've got 1 set of grandparents attending our wedding, my fiance's. They're not part of the processional or wedding party technically, but they will of course be at the rehearsal and dinner because they're close family. Everyone else at the rehearsal is getting gifts from us- the parents, groomsmen, attendants & our reader. I would feel bad not giving his grandparents something you know? But it's hard to think of ideas and get them designed and shipped at this late stage, we're less than 3 weeks out. It would be easy to send them a framed photo of us after the wedding, would that be good? Also they’re both getting boutonnieres along with the wedding party before the ceremony.