In another era, Paul Cesewksi might have run off and joined the circus — the latter-day carny tinkers with metal and machine parts to create lo-fi, bike-powered Ferris Wheels and Tilt-a-Whirls that send spectators spinning into Fourth-of-July reveries. Cesewski's interactive sculptures have shown up everywhere from Burning Man to San Francisco's Bike Rodeo; now, fresh off a residency at the San Francisco dump, he's built a whole new set of mechanical amusements scavenged from cast-off wheels and gears. Staged as a full-on carnival midway, they come together to form the magical Carnaval Mécanique.