1. Start a YouTube Channel: Develop engaging content within a specific niche that's all the rage among British teenagers.
  2. Selling Handmade Crafts: Market custom creations on platforms such as Etsy, with an eye for trends that appeal to British youth.
  3. Design Your Own T-shirts: Utilize platforms like Teespring to launch designs that resonate with fellow teenagers.
  4. Offer Gardening Services: Get involved with garden upkeep or perhaps sell plants, a straightforward way for young Britons to earn pocket money.
  5. Launch a Baking Venture: Delight others with homemade cookies, cupcakes, or breads, some of the most cherished treats amongst teenagers.
  6. Pet Sitting or Dog Walking: Look after pets in the neighbourhood—a perfect endeavour for responsible 13-year-olds in the UK.
  7. Online Tutorship: Offer lessons in subjects like maths or music through Zoom, a brilliant way for teens to utilise their knowledge.
  8. Photography Services: Provide photography for events or portraits—a creative outlet for young aspiring photographers.
  9. Tech Troubleshooting: Share your tech expertise by assisting with basic gadget issues, ideal for tech-savvy teens.
  10. Start a Blog: Express your thoughts and experiences online via platforms like WordPress or Medium, showcasing your unique voice to the world.
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Tip

Focus on activities you are passionate about and have a good grasp of.

Success varies depending on individual capabilities and the means at your disposal.