I think you have a lot to work with here in your idea. I’m not so sure you will be changing kid’s lives though. But I do think you will learn a lot about working and yourself through this experience. Maybe there is a nugget in there somewhere that can turn into a great essay. Remember it is only 650 words. That isn’t a lot of space to show yourself. Keep that in mind - what do you want your reader to learn about you through your writing? Good luck!