The only money that this activity will cost is a little gas money. Take your special someone....or the entire family, to look at Christmas lights. Most cities and towns decorate for the holidays. If you're lucky, you might find whole neighborhoods that go in together to put on a full light extravaganza. It is fun to see which neighbor has the most "over the top" display, or which one is "Christmas classic".
Check out your local paper to see if there are any Holiday light shows or house tours going on in your area. I know when I lived in Knoxville, TN. we had the Victorian House Tour. I loved it! Several houses in Old North Knoxville would be decorated for Christmas. The owners were gracious enough to let us, "looky loos", into their homes to see their turn of the century houses adorned with beautiful decorations.
There are also Christmas parades that don't cost anything to watch....but are plenty of fun!
Plenty of things to do around town...things that don't cost much, but would be full of Christmas memories. Go look...and have fun!