Ohio Northern University student Meghan Letizia helps Bluffton fourth graders Calloway Luke, Nicholas Jebsen, Skylar Liddick and Becca Gallant in a STEM activity on Feb. 28. STEM stands for Science, Technology, Engineering and Math. Bluffton resident, Dr. David Mikesell, a member of the ONU engineering faculty, led the day-long event that created lots of excitment for the students. Click for a video.