I just took delivery of some practice nunchaku off eBay :-) God what you can do in one day's watching tutorials! I just taught two of my kids the basics and we haven't broken anything yet.
Other than that. Midnight Commander (always had it, never learned it), picking up some Perl, Janet, Groovy. Some GDevelop with my kids.
Theory wise I'm working within my field to study some esoteric personality theory. A bit of math here and there. Some astrology stuff also for esoteric interest. Researching microscopes to look at buying one in the future.
Other than that. Midnight Commander (always had it, never learned it), picking up some Perl, Janet, Groovy. Some GDevelop with my kids.
Theory wise I'm working within my field to study some esoteric personality theory. A bit of math here and there. Some astrology stuff also for esoteric interest. Researching microscopes to look at buying one in the future.