Mystery dinner ideas

[Wilsonfamily4]

My inlaws are celebrating their 35th. Us kids are going to do one of those dinners for them where you order something off the menu that goes with the theme and you don't know what you are getting. So say they order little mermaid they would get a fork.

Anyway I am looking for a theme that would go good for a wedding anniversary. I am not creative but I know you guys are!!! Please help us!
i would also need help with the menu.