I'm 17, what should I invest in? Something that'd pay back at least a little in a month

I’m 17 and I have a total of 300 PLN from holidays/birthdays, etc. I know it’s not much, but what can I invest in and where? I’ve checked quite a lot of options, but all of them required being 18+ and ID verification. What should I use and what's worth considering? Thanks in advance.