Lightning Lucy of Mad Science of Maine (Taryn Friedman), right, asks Turner Elementary School fifth-grader Nick Tirrell, “What does this taste like?” during a past show in the school gym. Bad breath was his response. The mixture of water and dry ice was producing carbon dioxide, “just like we breathe out,” the scientist said. The Auburn Public Library will host the Mad Science Halloween Spooktacular Show at 6 p.m. Thursday, Oct. 26, in the Androscoggin Community Room. Science tricks and treats will be displayed during the free show. FMI: 207-333-6640, ext. 3.