Yes, just got a magnet one. He was over the moon. He is one of those kids who has a hard time with everything boring, like brushing his teeth or cleaning his room, but can lose himself for hours on end in the most impossible tasks when he has the drive. At the moment, his mania is the cube. So a magnet cube is indeed very much worth it.
Yes, we have a slight suspicion and are on the case. It’s challenging when you are very much not adhd, WHY CAN’T HE JUST DO THIS IT’S SO EASY, but my job is to understand and help, not force my way of thinking unto his. Thanks for corroborating my hunch, though.