"I'll do it." The answer came all at once, from every single one of the girls. In fact, it was so sudden that all of them blinked and looked at one another.
The wizard laughed, "Just as I thought. You girls are such friends that your bonds are stronger than any magic. This is why no matter your ages or the changes in relationships, you'll stick together and be just fine."
Each of them blushed a little, smiling. In their hearts they knew it was right. The wizard beamed and moved back behind his counter. "Well I am a man of my word, and I will do exactly as I promised."
"Wait!" Claudia said.
"Hmm?" The wizard looked to her.
"Is there some way those of us that want to become adults can do so?"
The wizard smiled, "Of course. But you must understand Claudia, your very nature is changing. You want to become a child on a subconscious level, almost spiritual. Once your a child, the desire to be a grown up, to try things will still be there, but you will look at it from the perspective of the girl you've become."
Claudia visibly wilted and the wizard noticed this. "I could always give you something from my shop that would seal your age, but you'd never grow or regress as a result. You'd likely not be human either...."
Claudia thought about it