I write programs for fun. Seriously. I’ve got games at home still in the box because I’d rather fiddle with some C# on Windows Phone than try to kill demons/drive cars/fly spaceships etc etc.
Pex is a great way to play games while you write programs. I’ve played with the web version before and now I can do that on my phone too. You can download Pex4fun and play along too. If you have any interest in brushing up your C# smarts in a fun (and portable) way then get this on your phone. It’s free too.