From the West Seattle Family YMCA (WSB sponsor):

Join your Y friends for an extra special Family Night celebrating the opening of the new Kids Zone! Tour the new spaces, play on the big toy in the Adventure Zone and bounce on the inflatable obstacle course. No open swim. Free!

More info >>
https://apm.activecommunities.com/seattleymca/Activity_Search/family-connect-family-night/46046