The lighting changes to make it night. The lights come on. You can see people inside of the buildings and it absolutely twinkles.
This is the train display at the Carnegie Science Center. It’s there ALL year long, not just the holiday and there are over 100 animations in it. There’s even a woman rocking on a porch in a rocking chair and a tiny cat whose tail swishes out of the way of the rocker every time it rocks!
We got the grand tour and two volunteers were kind enough to describe some details and answer questions the kids had about the buildings, planes and trains.
Mr. Gracey mentioned that he plays St. Nicholas four times a year. I believe it.