Playing a musical instrument. Baking. Indoor rock climbing. All are technical and hands-on. Less hands-on, but part of what I enjoy of being a programmer is

Playing a musical instrument. Baking. Indoor rock climbing. All are technical and hands-on. Less hands-on, but part of what I enjoy of being a programmer is reading pretty technically deep articles/white papers/etc. When I want a break from that, reading fiction is wonderful.