I'm actually able to whistle a lot better than I could before. Still takes some effort, but I'm getting better. Definitely should be able to complete this by the end!
I think I whistled accidentally last week. didn't manage to do that on purpose, of course :d
Done at 12.11.12.
I think I am pretty good at whistling now :)
Thanks to songs like Flo Rida's "Whistle" and Audrey Assad's "Ought to Be" my whistling practice has increased during car rides. I can do short 1-2 second bursts now, but can't sustain a melody yet.