There was a wonderful and extensive thread on this a while back. Fidget Blankets might have been what it was called.
A HUGE list of inclusion ideas was developed. Some pics of what others had done. As well as ways they'd been made.
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Here you be ....
via the Search function at the top of this page, by entering "fidget blanket" ....
http://www.quiltingboard.com/search....blanket&u=&s=0
The first link is the thread I mentioned, though I'm sure there are LOTS more ideas in the many other threads shown.