Saturday, April 26, 11 a.m.–2 p.m.
Moscone Playground (1800 Chestnut St.)
S.F. Rec and Park brings the fun to you at a different park or recreation center every Saturday. Try rock climbing, BMX biking, slacklining, and skateboarding; get tips, and learn tricks. Helmets required. Free, 415-831-2700, sfrecpark.org