Challenges worth doing (Not click-bait)  

1. Shiny Aluminum foil ball

Here we have the aluminum foil challenge. This challenge originated from Japan. You take a whole roll of aluminum foil and form the core for the ball.

Then you use a rubber mallet or ball peen hammer and gently tap the aluminum ball to condense it (it can't be rushed, this is the longest part or you'll get cracks).

Third, you use sandpaper from 150 and gradually work up to 1500/2000/3000. I bought mine from Home Depot.

Finally, apply some metal polish on the smooth surface ( couldn't find metal polish at Home Depot )

P.S. If any of you have successfully made this please comment even if you are correcting the process here. I appreciate the accurate feedback. I haven't made it yet.

Instructions to make foil in Japanese (there are videos in English, but I haven't found a good one worth linking)
source: https://www.youtube.com/watch?v=WKz5lCGMf5Q&t=512s

2. Shiny mud ball

Another challenge that came from Japan. Kids in their pass time would make these. "The tradition was dying out until taken up by Professor Fumio Kayo, of the Kyoto University of Education" - about hikaru dorodango

I've never made this either, but I'm going to try these challenges out and post my results.

Instructions to make Hikaru Dorodango in English:
source:
http://www.dorodango.com/about.html

EDIT: First time FP and it didn't require my dog dying. Soon to be happily married, so no bobs or baginas. Send me your best ideas pass times. Thanks for the feedback and grammar lessons. Kudos!