Describe a good idea that you had

A good idea I had was to start a book exchange corner in my university's dormitory. I thought of it about a year and a half ago, when I noticed that many students, including me, had piles of books that we'd finished reading or no longer needed, while others couldn't afford to buy new ones.

The idea came to me one evening in the common room. I saw two students arguing about a textbook that only one copy existed of, and at the same moment I realised how many unused books were lying in our rooms. I thought, why not create a place where people could leave a book and take another?

First, I asked the dormitory manager for permission to use an unused shelf in the corridor. She agreed immediately. Then I made a few posters and posted a message on the students' group chat. I also donated twenty of my own books to get it started. Within a week, the shelf was full, and within a month, we had to add a second one. Students began leaving notes in the books, with recommendations and short reviews, which I found very charming.

I think it was a good idea for several reasons. It was cheap, practical and simple, and it required little effort to maintain. It also encouraged reading and created a sense of community, since students who had never spoken to each other started chatting about novels. Moreover, the idea caught on, and another dormitory has since copied it. It shows me that a small idea can produce a surprisingly large effect.