Chad Lauritzen, ‘The Science Guy’,  gives Jordan Holsapple left, a ‘heads on’ experience with science. Lauritzen will bring a free bubble presentation to the Betty Ehart Senior Center, 1101 Bathtub Row from 12:30 p.m. to 1:30 p.m. Tuesday to help kick off the six-day celebration of ScienceFest. Families and seniors are invited to attend. Photo by Bernadette Lauritzen