In celebration of Bob Moog's birthday, Google's homepage doodle today is a working, recordable synthesizer. Kill all of your productivity today by playing with it, and then share your results in the replies.
Seriously though, if anyone can work this well enough to cover some MCS, do post! I'm more trained on a piano (learned to play/took lessons for 8 years or so) so I'm more of a pianist than synth player, but I do screw around on synths occasionally. Wish I was better though.