Here are things I do in my free time.
Coding for Fun
WikiViz. Display an interactive graph of Wikipedia articles. Nodes are connected if there are links between them. Nodes can clicked to expand further nodes. I probably wrote this sometime in 2010-2012.
Some photos I took are here.
Here are some (cherry-picked) pictures of latte art I made. I obtained these after lots of trial and error (perhaps pouring and seeing nothing for at least 200 cups). I still have a lot to learn.