DNAinfo reports on the Opening Day of the Grant Park Skate Plaza this Saturday, December 6th. "People really want to use it. It's really motivating to have park space that's going to be used by people from all over the city and suburbs," said Bob O'Neill, president of the Grant Park Conservancy. "I think the only people more excited than me are the skateboarders and BMXers. They've really been anticipating this."