[UPDATE on March 16: A morning seminar on financial aid and scholarships is not scheduled for this year’s event. A prior version of this story included outdated information.]Scores of middle and high school students will demonstrate their skills and host a day of learning, discovery, competitions and fun activities centered on science, technology, engineering and math Saturday at Clark College.It’s the sixth-annual MESA Day, hosted by the Southwest Washington Math, Engineering and Science Achievement program that brings underrepresented students into technical fields of study. Participating students and their parents may attend events that run from 9 a.m. to 3 p.m. in various buildings on Clark’s main campus, 1933 Fort Vancouver Way.An electrical engineer from the Bonneville Power Administration will host a presentation, and an awards ceremony caps off the day.A new attraction this year is a Wind Energy Challenge. Students have built wind devices that must be able to lift a mass, move a vehicle and, for high school students only, generate electricity. Students will test devices, give oral presentations and develop an academic display board, all within the O’Connell Sports Complex, from 10:15 a.m. to 12:15 p.m.