E.C.
how about a pizza and pajamas party? have the kids come in their jammies, eat pizza and watch a kid-friendly movie, maybe have a simple craft activity station or some lego-type building toys available for kids who aren't interested in the movie. And if you have toothpaste and toothbrushes for party favors, parents have the option of brushing their kids' teeth before they head home, and they're already in their jammies so they'll be ready for bed when they get home.