Here is a little moving sidewalk, which can be placed side by side to make it seem like they move in opposite directions. They're pretty cool, and if you walk faster on them, you feel like a superhero, like a speedster, since you are going so fast. It is really fun. Denver has some, and so does Salt Lake. Any airport bigger than a little toothpick airport in the middle of nowhere (cough cough Billings Montana cough cough) needs one, or has one already. Made as a 3D model for my own personal airport, KBEN, but can be used for other things. Low poly.