Wasn't until some odd months ago that I heard of stimming and that it was related to Autistic spectrum disorders. Despite you know doing it for my entire life. (Yay hand flaps!) And then I found out they make toys exactly for that! I kind used to improvise, without really intending to, because you know I had no idea why. Gosh sometimes I just love stimming. A friend showed me this site just for stim toys and I couldn't resist getting the Halloween pack. It was a good deal. Now I'm just so excited and all the hand flapping.