Awesome. And now she can go back to practicing telekinesis, too, that's harder to hide on the inside of a book bag. Write on this conjured pad of paper, conjured pen!
Conjuring more massive and voluminous items than she could get away with in class! Attempting to telekinese them! Doing a stupid dance of sheer glee in midair because she can fly!
And after another day or two of her revised schedule of classes-while-sneaking-practice-followed-b
Its function is not immediately obvious, but reveals itself after a bit more poking: it's a telepathic communicator. Sending only, no specialized receiving function. It's willing to send to anyone she knows well, as long as they're approximately nearby - in the same building, or just a ways down the street.
Okay.
Anna and Cass do not by any stretch of the imagination qualify as nearby, so she has to get out her phone and open the email app to inquire as to whether this is normal.
Not any of them in particular, just whichever one you've used enough to get it.
And then she puts her phone away and concentrates on her sister.
Heeeey I'm telepathic now! Possibly you are too, I don't know, Anna didn't say how much you had to use a rose to get it but you've had the blue on your wrist almost as long as I've been wearing the pink one around and anyway this is a thing!
Enh, it's the roses, maybe if you work hard and believe in yourself you can send your innermost thoughts without lossy lingual compression.
And then back to class, with her sister chattering in the back of her mind. Can she make a bookmark already tucked between the pages of a textbook? Can she make a small rubber ball in motion inside the desk? Can she pierce her ear with a small, spontaneous stud? (She shakes her hair over that ear first and sets it to last only seconds, trusting in her rose regeneration to close the hole. The point is not to acquire a second ear piercing, the point is to see if the thing can be done.)
She can make a small rubber ball and use telekinesis on it the moment it emerges; 'in motion' is not a setting the conjuration process seems to have.
Pushing a conjured item through the final barrier into reality when the destination point flat-out intersects with a solid object is really difficult, even more than just the bookmark trick, but she's strong enough to get the spontaneous ear piercing past the resistance.