What should I give as a party favor?

My husband and I are going to be moving to FL. Some of our very close friends where we live now are hosting a dinner party, probably 25 people will be there, and my husband and I want to give everyone something. Well, some people are part of a couple, so it does not have to be 25 gifts. Recently, a friend of ours had us over for dinner with some other friends (not related to our move) and he gave his guests a framed photo from his trip across the southwest US. The photo was amazing, should be a post card.

So what can we give?