Making money at school?

So, a while ago I had an idea, seeing all my friends sell candy, I thought I would be able sell soda, and for about 2 months it worked well, but then someone ratted me out, and I was threatened with suspension, so I decided to stop. They also forbade me from selling candy, although I am still contemplating it, but I wanted to know if there was anything else I could buy in bulk besides food and beverages that I could possibly sell cheaply at school, unless these are new and interesting foods and beverages of course. On occasion I sell Duct tape wallets, but repeat costumers in that business are a rarity. I am unable to get a job because I am only 15, and everywhere I apply, I am told that 16 is their minimum hiring age. And no, I am not going to sell drugs, or my body, because those are the two answers I received most when I asked at school lmao. So if anyone has innovative Ideas, please let me know, I could use some money for an occasional movie or restaurant trip, and business experience wouldn't be a bad thing either. Thank you for your time.