Okay kiddo, SantaCon is when lots of people dress up in red and white like Santa Claus and go out onto the streets to celebrate Christmas together. It starts in one place and moves to different spots where there might be games, singing, or just hanging out with other Santa (and sometimes elves or reindeer) friends. It's a big fun party where everyone tries to have a good time and spread some holiday cheer. But since there are so many people, it's important to stay safe, be respectful, and not cause any trouble. It's like a grown-up version of dressing up for halloween and going trick-or-treating with friends!