An easy, free activity.  Get the kids ready for bed, then toss them in the car for a ride around the neighborhood to look at the lights.  Validate the time (and money on electricity) that people have spent to be festive in their holiday decorations.  There’s also a secular light show at Brookside Gardens in Wheaton but it costs $15-$20 per vehicle.  I’ve never done it but people say it’s very nice.  Open through Jan 4.