Excellent. And maybe test/train her weight limits by generating gradually massier items.
Her concentration is, sadly, diverted as she has to finish the rest of her schoolwork (she has never resented its intrusion more than she does now, this is fun) but she manages to force at least a few more grams out of her capacity before she looks at the time and makes herself go to bed.
The next morning Edie notices the number of blossoms on her sister's forearms and raises an eyebrow.
"The other ones don't really feel like much in comparison to the black one," she says a little defensively, "and it got so that not being able to conjure stuff was more annoying than the pain."
"To return your own sentiments--don't hurt yourself. Well, I mean, besides--you know what I mean."
When a classmate wants to borrow a pen, can she stick her hand in her bag and conjure a pen in it that will last longer than the class period?
She makes a pen that'll last three minutes and scribbles on the margins of a piece of notebook paper with it, then tucks it out of sight. Does the paper stay writ on when it vanishes?
...
This means she's permanently made something. Ink is something. That is so cool. Between this and the fact that the roses heal all injuries maybe it would be a good idea to see if she can make food you can actually eat. Unless food is too complicated and/or massive, in which case she needs to push herself some more. She puts her hand back in her bag and tries to manifest a piece of chocolate.
It only needs to last about fifteen minutes. She can eat a bar of chocolate in much less than that time, even with the need to conceal it so no one catches her snacking in class.
During lunch break, she ducks away to a secluded corner and attempts to will a chicken sandwich into existence.
She is less hungry after she has eaten it! How does she feel after the half-hour she gave it elapses?
This is so great. Can she make ink directly on things? Will it go away if she does? She gets out a sheet of loose-leaf, makes a puddle of ink on it, and gives the ink fifteen seconds--long enough to stain, not long enough that it would all have soaked in.
So far the things that have continued to exist are things that have gotten mixed up with other things--saliva, paper and chyme. She dashes off to a bathroom, makes a simple glass cup to last half an hour, fills it halfway with water, makes more water at three minutes to fill it halfway, and conjures a stirrer for good measure to make sure it's properly integrated.