There are many websites like Upwork or Fiverr where you can offer your services to clients in need of freelance work. Freelancing can be a great way to make money on your own schedule and build up your portfolio. 6. Sell items online: If you have old clothes, toys, or electronics that you no longer use, selling them online can be a great way to make money at a young age. You can use websites like eBay, Poshmark, or Facebook Marketplace to sell your items to others who may be interested in them. Selling items online can be a great way to declutter your space and make some extra cash.