Okay, honestly, I was waiting for someone to come up with a better idea than mine, but perhaps this'll get you on the path to something that might actually be more what you want.  I was thinking of some sort of thinnish dowel-type trim--clean and mitred (I can do it, but I can't spell it) and lean and mean.  Seems like it would be sort of neutral in style and easy on the budget.  

If you give me more details, then I'll give you more crap ideas.  maybe. Depends on if the twins nap or not.

 leslie