I specifically remember having three goals in life when I was around four years old. I promised myself that I would learn how to tie my own shoes, blow a bubble, and learn to whistle by the time I turned five. That is one of my first memories, and I still laugh at how adamant I was at achieving those tasks. XD
Yes, I do know how to whistle. It took me a couple months or so of practice, but I finally learned to call upon that amazing sound whenever I want. Whistling is a good stress reliever and pretty fun at that. As I can't carry a tune to save my life, I'm often found whistling the melody of a song. Needless to say, my family often wants to shoot me.