vouchers are always a safe bet but nice classy picture frames are always a good one for wedding gifts because the couple invariably want somewhere to stick some of their wedding pics. Plants, trees, roses bushes etc are nice if they like their garden - we had a rose given to us called "Wedding Day", and there's a shrub called The Bride and lots of stuff like that, we were also givena rhodedron which was in flower at the time so it flowers again every year for our anniversary. If they are in their 50's they probably have all the pots and pans etc they ever likely to want and they won't need a toaster or a kettle. what about a case of some special wines for them to enjoy on their own afterwards