My DD7 has ASD and is a sensory seeker and loves holding and squeezing a piece of blu tack, school are great about this and accept she needs it to concentrate in class.
Today in class she pushed the blu tack up her nose (completely stuck right up the top)...2 hospitals and 5 hrs later the blu tack is out!
Is there anything similar that gives the same feedback as a blu tack? I have bought various sensory toys before and she doesn't seem to play or get anything out of them, so would have to be very similar.
Clay is a no-no as she eats it!! 
I have also looked at theraputty...I don't think the school will allow this as it can be messy!!
TIA