Amara Powers, 3, of Turner is excited Monday to receive a dry ice boo bubble from Janna Botka of Bethel at Central Maine Community College in Auburn. Powers and her sisters Lexi Coyle, second from right, and Danika Coyle went trick-or-treating through the campus on Halloween. Botka handed out boo bubbles and candy during the college’s Halloween Festival. Daryn Slover/Sun Journal

Kyle Chapman hands out candy Monday to trick-or-treaters at Central Maine Community College in Auburn. The costumed children are siblings of Jasmine LeShane, a student at the college. The anatomy and physiology instructor’s classroom is one of 24 rooms children could visit while trick or treating. Daryn Slover/Sun Journal