All four levels in the Seattle Youth Symphony Orchestra family will perform for the orchestra’s 70th anniversary gala, which will also feature appearances by SYSO alumni. Among the latter: political cartoonist David Horsey, radio-host Steve Reeder and Seattle Symphony violinist Mae Lin. 3 p.m. Sunday, Benaroya Hall, 200 University St., Seattle; $20-$50 (206-362-2300 or

Seattle Time staff