I just made CI's molasses cookies (from NBR) yesterday and think they would be great on a dessert table.  It's funny that kids just 
gobble these up.  I thought the strong taste would be offputting, but I've yet to meet a kid that doesn't like them.  Not that that matters for your party though.  
 
 I also agree a fruit based dessert might be nice, even a fruit salad that could be made a day or two early.