Music and coding
One of my favorite things to do is coding up electronic music and just generally playing.
Decade ago that used to be very hard but my favorite goto software now is Sonic PI! I really like Sam Aaron who started coding this up and built a community around it.
Here is his TED talk if you need inspiration.
Another great resource is finding music snippets online and then changing them live and making it your own just for fun! It’s just such an amazing experience that words can’t describe – you have to do it to feel it!
Here is one site which has great tutorials and music snippets.
Even for non-programmers, it will make you go ahead and learn little bit of programming just so you can have fun composing music and just playing!