They can be good for approaches to general health, though one would want good drugs for anything serious.

Tai chi = is an East Asian / Taoist martial art that's good for physical health. Kids would benefit from it.

Acupuncture or acupressure = an ancient method of manipulating certain nerves, to temporarily limit pain and help other areas of the body receive more attention and thus heal in the process. A good massage can also help (by adults, not kids)

Reiki = a Japanese approach to a kind of acupressure and sensory body awareness that I know very little about. I doubt it's useful to someone who doesn't believe in it.

(I worked in a healthfood store a hundred years ago, where I learned about these options.)