well most dragons do not know each other at the start XP

She may have for focus to see if someone remember her? To try discover what happened to her to loss the memory.
She can be thinking that watching the aging may remind her of her own aging to become a teen.

Or to make new friends, or find a mate.

Before the aging ceremony start, she could go take a swim and eat something at the waterfalls. Or maybe want to age to a adult and go to the training grounds to train. 
Or maybe look for something like a stone piece.

Best is to have some idea what you want to do with her, and try to use tat as her motivation, for starters. Then see how things work out and such change focus etc.^^