Ellwanger Barry Nursery School Open House! EBNS is a unique, play-based program focusing on whole child development through imaginative play, purposeful activity, the arts, storytelling, and exploration of the natural world. We offer cooperative nursery school classes for 3 to 4-year-olds, 4 to 5-year-olds, and a semi-cooperative KinderGarden class for 5 to 6-year-olds in a multi-age educational setting.