Oh, my, so many. I didn't look at the official link here on this thread, but these lost feelings come into my mind: The excitement of seeing what Santa had brought on Christmas morning, the fun of swinging on a swing set, the enjoyment of just spinning around for the sake of getting really dizzy, the thrill of playing kickball, the joy of being read to, and the fun of making mud pies and pretending to cook them in my toy oven.
Just thinking about all these fun memories makes me happy. Thanks for this thread, chocmouse!