I know some people who make jewelry from home but they usually sell at craft fairs and on Etsy

So, there really isn't a company that pays people to make jewerly and or crafts and send them and they get paid for doing the mass production?

I imagine that such a company exists - in the same way that there are companies that do the same for clothing - however, I assume that many are either scams, or are unfair to their workers, which is historically how such things worked. Etsy shops owned and staffed by people working from home is also a thing, and seems more honest, if no less risky.

I'm just looking into possibly doing something just to get a little extra spending money. Doesn't bother me at all if I end up not getting overly all that much.

Then you will probably find something to satisfy that interest. I can't tell you where though - it's not something I've ever looked into.