What a cool idea. How about a bottle of wine and 2 nice glasses (non-alcoholic if necessary) - sometimes you can get vintage glasses cheaply, and they don't have to be the same, sometimes kitchen/homeware stores sell incomplete sets at bargain prices. Crackers, spreads/dips or organic canned olives/coffee/chocolates. When you have little kids you need some "grown-up" stuff to remind you that you're not just Mum and Dad.