I used to build stuff, but not for awhile. I graduated as an electrical engineer, and I built goofy stuff for fun. For example, I built a custom break beam detection alarm system for my father-in-laws shop, complete with my own home made power supply. A year or two ago I helped my son build a couple of guitar pedals, but they were pretty simple. I am rusty as heck with it, as I don't use that knowledge for work anymore.