My son has a one-track mind. When he focuses on something, he cannot get it out of his head until it’s resolved. Each weekend he seems to have something else on which to dwell. Sometimes it’s a certain book or movie he just has to have from the library. Sometimes it’s something he desperately wants to order from Amazon. Last weekend he was harping on finding an instrument to use for band. This past weekend suddenly a new bike (which in all truthfulness he needed) was of utmost importance, and he didn’t want to wait. He wanted it now. The thing is that he won’t rest until whatever he’s been focusing on has come to a proper conclusion in his own mind. He harps on the subject at hand over and over, which can honestly get wearisome after a while. In time I have hopes that this can become a favorable trait and work for his good. But he just can’t give up or forget whatever it is that’s on his mind. It’s that important to him.