Members and nonmembers are invited to a free, drop-in evening for families with children of all ages. The Hastings YMCA brings out a bounce house, scooters, balls, gym mats and other equipment so families can play together in the gym. A parent or guardian must supervise every participating child. Families can also use the pool during open swim. Children younger than fifteen must meet the YMCA’s swim-test and wristband requirements or use a life jacket or stay within arm’s reach of a parent, as specified by the organizer. Review the YMCA’s pool age requirements before swimming. The event runs from 5 to 7 p.m.