Whether delivering a monthly themed box of STEM activities straight to your door or creating a solar powered cell phone and tablet charging station, the startups springing out of Northeastern’s venture accelerator IDEA are nothing if not diverse.

The word “diverse” continued cropping up at the Northeastern Entrepreneurship Expo held Wednesday evening in the school’s Cabot Athletic Center. Roughly 40 ventures presented to a milling-around crowd comprised of students, faculty, alumni and members of the Boston tech community.

Among them was Hugh Courtney, dean of Northeastern’s D’Amore-McKim School of Business. In his nearly two-year tenure, Courtney has frequented roughly four NEXPOs, each getting better by the year. “As far as I’m concerned,” he said.

Courtney commended the breadth of the startups involved Wednesday. “The diversity of ventures … suggests to me a healthy venture accelerator,” the dean noted, soon pointing to another powerful part of the program: the students. “I really do believe it’s the student-run nature of IDEA that is the secret to its success.”

IDEA’s coaching team is made up of enthusiastic students whose sole goal is to see their peers succeed.