Many of us begin a hobby for fun and enjoyment, not necessarily for profit. However, many hobbies that make money are win-win situations for your wallet.
Photography as a hobby can be very gratifying as you capture special moments in beautiful places. I enjoyed photography, taking classes, learning how to develop film, buying camera equipment, lens, tripods, and such.
You just need a pen, paper, and creative ideas to begin writing and publishing. The benefits of picking up writing as a hobby to make money are low cost, a desirable communication skill, easy to start, and you can do it independently.
Flying drones can be an exhilarating hobby that makes money. It is an exciting hobby that requires precautions with the risk of crashing your drone, so there is a learning curve.
Gardening is a hobby with many benefits. Besides encouraging you to work outdoors, gardening is a form of moderate exercise (if you work 2.5 hours) suitable for your mind and body.
Listening to music can be soothing for your body and soul, relieving stress and providing health benefits. Making music is relaxing, whether you are playing an instrument, writing music, or making your beats or samples.