I have not done this in a while, but I thought it was pretty cool....

Japanese paper folding... Origami

Watercolors are fun. But, acrylic might be easier because you could put the painting on an easel ... watercolors usually are done flat to keep the paint from running. Bob Ross taught a style that people with almost no talent can do. I am sure libraries would have books on it. Oil is easier than acrylic, but more fumes, more cleanup.

Crocheting is not very "masculine" but it is fairly easy to learn, and you can make great shawls, afgans etc. without to much training.

Calligraphy! Italic writing.... you can make some good money doing wedding invitation envelopes too! I used to before I got my hand slammed in a car door and lost my dexterity! Used to get $1 per envelope... The book I used was "the italic way to beautiful handwriting" and I just got paper called onion skin and paper clipped it over the text book to practice instead of using the book itself.. that way I could practice more times.

I'll try to think up a few more....
Jules

let me tell you a good crafty thing for the hands.
my 2 girls, 11 and 12, both were doing needlework after school. a teacher started this to teach the kids to learn to sew.
but what she did was do beadwork. this was end of last year so it was all chrismassy. when i first went to pick the kids up from school, the teacher called me in and said............"here's your beadwork, start." LOL she didn't charge me for it or anything. but let me tell you these beads weren't big they were small LOL. it helped tremedously just keeping hands working. you don't have to do it 24/7 just do an hour or 2, put it down for a bit then do it again. you'll be amazed at how it keeps the hands excercising.

I enjoy reading finding it hard to hold the newspaper so I have to lay it on a table, and books it is hard to turn pages but I make do, I'm learning to use my other hand and arm retraining LOL my youngest child writes better than I. I think I will try to paint again,watercolors and draw. My kids tell me I dont play X-Box with them anymore like frogga said need my hands for it..