Most pegasi figure out flying easily enough... but not me. I wanted to fly so badly, but no matter how hard I tried, I never could, and nopony seemed to know why. But just when I was about to give up...
Rainbow Dash's foalhood is unknown to us. She never talks about it, the only mare who knows anything about Rainbow Dash's mysterious past is Fluttershy. One day she receives a letter from her parents that gets her thinking of her foalhood.
Scootaloo had been without a family for a very long time. She has never told anypony about her situation. It isn't until a certain purple unicorn learns about her origins that she discovers what a family truly is.