"When you see this, do you think it's just fun? Or do you think that it's illegal? It is definitely the latter. Whether it's fun or not."
This is the beginning of a Facebook post by Colorado's Aspen Police Department (APD). What is this possibly fun but definitely illegal activity?
The post includes a photo that shows two children on a bike—one child sitting on the seat and the other on the first rider's lap—riding on a sidewalk.
