I'm a fidgety person too. Just a thought though - I seem to be physically incapable of actually standing still for minutes at a time. After less than a minute my whole body is saying MOVE!!!! and I am unable to think about anything else until I go back to fidgetting. Trying to push through this makes me feel kinda dizzy and just wrong
. I have never tried to remain still past this point because I suspect I would faint. The fidget feeling kicks in before I start feeling wrong, so in my case standing fidgets are necessary to keep my body functioning properly. It may be similar for her.
Also, many of my joints start feeling like they need oiling/seize up if I leave them in one position for too long - moving them before this happens comes naturally, and I think it is probably better for my body.
On the other hand, I appreciate that it can be distracting for others.
The wobble cushion is a great idea - but I'm guessing you don't need yet another person to tell you that
I wonder whether she would also benefit from a stress ball/hand therapy ball in lessons? That way she can fidget with her hands in a constructive way while, for example, listening to the teacher. Hopefully it would be less distracting for the other kids. (At work I always had a stress ball on my desk and it always got used when discussing things with colleagues)