The Baltimore Zoo is a great afternoon destination during the summer months. In addition to their various animal displays, they also have impressive programming for grade-school aged children in the form of workshops, camps, and afternoon classes. I've also attended some of their special events, like Boo at the Zoo, Roar and Snore, and Brew at the Zoo. Brew at the Zoo is a not-to-be-missed event, where local wineries and breweries host tastings while local bands and DJs entertain. Just don't give the prairie dogs any alcohol-- those little guys are wild enough on their own!