Emily Ramm (left) smiles while holding her hand on a Van de Graaff generator under the instruction of Mike Randall, Outreach Coordinator of the Wonders of Physics program, during STEMfest on Saturday in the Convocation Center. STEMfest is an annual event in which Northern Illinois STEM (Science, Technology, Engineering and Math) departments, student organizations and corporations, among other groups, present activities to raise awareness of science and other STEM fields.