What's something you did as a teenager to make extra money?

Always find these stories to be especially interesting

Investing @variant, writing at https://backoftheenvelope.substack.com/

8: Resold candy from a bulk candy outlet on the playground
10-11: Made enough to buy a computer + graphics card to play a MMORPG with USD-pegged currency, traded in-game items
12-13: Played online poker until it got banned
14+ Parents convinced me highest ROI was to study and get a university scholarship, so I did