When we were kids, adult supervision in San Francisco was pretty optional. During the summer the city was like a carnival, with abandoned parking garages and mazes of undergrowth as thrilling as any adventure ride. Like most kids, we found epic struggles — villains who intimidated us on the 14 Mission, great loves with the durability of a scoop of ice cream — and wonder at every turn. When adults envision worlds ruled by children, they sometimes capture the gravity of childhood experience — Lord of the Flies comes to mind — but rarely do they accurately depict wonder. So we are really excited to see what young people come up with for We Took Over the City, a group exhibition that asks 45 underage artists to imagine San Francisco without adults. This show is the final project of Mission Voices Summer 2014, an intensive youth program that uses art to explore social issues and personal experience. Hopefully, the grown-up mentors gave these kids plenty of rein.