Teens at Urbano are busy preparing their winter exhibition, Urban Myths + The Dream Machine, which opens December 17, 2013, 5:30-7:30 pm. This is the second exhibition of their yearlong theme, “The Emancipated City: Reimagining Boston,” and will showcase art combining video, performance, installation, and sound, all created by young artists in partnership with their teaching artist mentors. This event is free and open to the public and will take place at 284 Amory Street, Jamaica Plain.