icing on the cake?

[ehmumbo]

So, am about to order a big 5.0. cake for my parent's wedding anniversary party and am trying to decide what message to write. Rather than "congratulations' am thinking something funny would be nice... like "and still smiling" ... is that silly? Can you think of anything funny to write that doesn't sound off key IYKWIM?

This is really hard without knowing them - do they have any sayings or do they refer to themselves in any particular way? My inlaws always refer to themselves by a team name, so I'd do something about that. I like the idea though.