Building models. That is for the patient. It's not for the kids who just want to sniff the glue, as my sister's friends said to me when I was a kid.
And
@Rocky998 - I'd say, personally, that Evel Knievel or Edmund Hillary didn't do great things, although they sure had fun. I went to school with the grandson of one of the Sherpas who went up with Hillary. He had an interesting take.But whatever you can experience, do, learn - it's all of value potentially. If an asteroid hits the planet and we here are the only survivors, we'll have shoes, a boat, theme music from my non fish obsessions, and whatever you can bring to the table!
I am serious though. It is remarkable how many things I learned I thought were time wasters paid off at various points in my life. Whatever you learn, learn it well and keep going.