Art in the Park - The Hippo Playground Date: 08/27/12 Ages: All Address: W. 91st St. in Riverside Park - 212-870-3070 Upper West Side, NY 10115 riversideparkfund.org/hippopark Description: The Hippo Playground Project is sponsoring free arts and crafts activities for kids every weekday morning during the summer. In case of inclement weather, the program will take place in the parkhouse. For more information about the Hippo Playground Project, please e-mail hippoplayground@yahoo.com.