Have you ever wanted to earn a passive income as a campus student without interrupting your studies?

Why do students want to earn money at school? It’s simple. Students who live away from their families have to spend money on personal upkeep, such as food and lodging. You will also have to handle planned and unplanned day-to-day expenses at school, such as copies of school supplies and dues payments to the relevant student council.
Earning extra money on top of what your parent/sponsor gives you helps reduce the burden on the sponsor and most importantly helps the student maintain their savings, writes about the importance of embracing a culture of student savings.

The list of ideas is in this post How to Make Money Online as a Nigerian Student (edulite.org)

What are other ideas you think are marketable on campus? Also, if you have people that ran successful businesses on campus, kindly share them with us on the forum.