Her childhood ambitions did not include becoming an astronaut but she did want to get a pony and learn how to braid her own hair.
It is not entirely certain if Scully is being honest when she tells Mulder her childhood ambitions in "Space" as she reveals them sarcastically, after Mulder tells her about his own boyhood ambitions. However, given the fact that Scully has no motive to lie, it seems likely that she is telling the truth.
On several occassions, Dana's father made her and one or more of her siblings take the family Christmas tree down on the day immediately after Christmas.
It's unknown how many times this happened and which of Dana's siblings helped her. Evidence of this routine comes in the form of Dana recalling, in "Beyond the Sea", that her father "always made us take the Christmas tree down the day after Christmas."
For some or all of her fourteenth year, Dana lived with her parents in a house that had two or more floors, and a porch outside. She slept in an upstairs room of the house.
Once, when she was 14, Dana snuck downstairs alone, after her parents had gone to bed. She got one of her mother's cigarettes and went out onto the porch in the dark. She was incredibly scared and her heart was beating, although she was extremely excited - not because of the cigarette, which she found "gross", but because she wasn’t supposed to take it and because she was aware that her parents would be extremely angered if they discovered that she had.