I had not even heard of these spinner deals until last Tuesday when I kid I help brought one in. I didn't know it had a purpose, I just thought it was a toy. The thread has derailed but I might as well join the fray. The kid that brought in the spinner has never been officially diagnosed as ADHD, but his Mom is convinced he is. From my work with him, he's more than capable of remaining on task, he just prefers not to and knows he'll be able to get away with it if he continues to push. He can do the work, he would just rather be doing something else like playing on an iPad or messing around with Star Wars toys.