For close-ups you might check your camera and see if there are threads on the front of the lens. If they are threaded, you can buy close lenses that screw on the front of the lens. The threads will be on the inner surface of the lens.
https://www.amazon.com/dp/B004E54LBQ/
If you have a DSLR with interchangeable lenses, they are almost surely threaded. With point and shoots you may not, but your camera may have an optional threaded adapter that lets you add lenses and filters. They work similar to the magnifying glass idea except they are fixed to the camera, so no trying to hold both. Also they come in different strength.
