Under the weekly guidance of Twin Cities artists Matthew Bakkom and (Walker staffer) David Bartley, members of the Walker’s Teen Arts Council have spent the past couple months learning the nuances of collecting. Five of those teens — Marina Balleria, Olivia Ebertz, Zoe Sponsler-Hoehn, Libby London, and Marty Marosi – spent much of Saturday in the bowels of the Walker, curating and assembling the Council’s amassed items into a vitrene. Look for it on exhibit in the Bazinet Garden Lobby, beginning May 15.