The Marinette Recreation Center announces the supervised playgrounds are now open for the summer. Playgrounds at Fred Carney Park, the Duer Gym, and Higley Field will be staffed by supervisors who will offer fun activities to children ages five and older throughout the summer months at no charge to participating families. In addition, the School District of Marinette will also provide free breakfast and lunch at these sites. Supervised playground hours are from 9:00 AM until 3:00 PM each Monday through Thursday.