Wish I had the patience and the steady hand for it.
There was a one page article in the April Popular Science about a compressed-air-powered vehicle a couple of people had built almost entirely out of Lego, I probably could handle something like that. :’)
When I was a kid and into war-gaming I use to paint small lead figures, usually I did the final details with a single strand of hair. Now my arms aren't long enough nor do they make a set of cheaters strong enough to even come close to what I could do then...