Gift For Anniversary

Can You Give Me Some Ideas? It's My Parents' 18th Anniversary Next Sunday And I Want To Get Them Something. I've Never Bought Them An Anniversary Gift Before So I Have No Idea What To Get. My Dad Likes Coffee, Computer Games, And History. My Mom Likes Decorating And Vintage Things.

P.S. I Realize A Week Isn't Very Long To Look For Something So It's All Right If I Give The Gift Late.