What can a 15 year old do to make money

What can a 12 year old do to make money - , i'm alex (girl) and i'm looking to make about 0 within a few months and my older brother has already taken a lot of jobs like mowing, landscaping, watering plants, watching a neighbors house and such but i'm struggling to find something else that he hasn't done. When we got my lab we breaded her once and kept 1 over her pups and sold the rest and plan to do it to the pup we dont do it for money we keep my first labs blood in the family and breeding them matures them alot. Im 11 years old and i dont really know how to make money even after looking at this site i also need to learn how to save money i am saving up for a hoverboard and they are about 9. I'm pretty sure if you buy one of your neighbors something worth thousands of dollars and then ask for the money ehhh… well let's just leave it at “this won't end well”.