Free Spirit Sled Demo Team joins Green Valley Dog Drivers for this awesome FREE event. The day’s events will feature wintry fun for the whole family, including dog-sledding demonstrations from members and their four-legged friends of the Green Valley Dog Drivers between 10 a.m. and 2:30 p.m. on the zoo’s West Mall. Members of the organization will engage guests in games and musher talks with their canine teams.