I used to have one of those!! Might get one again at some point because it's so calming.

Also, I know this is a weird add on, so I apologize, but I was in an MRI scanner yesterday and it is by far one of the most calming things I've ever tried. Like a spa day at a rave party. The magnetism is so intense, btw, that it actually kinda feels like a massage or a weighted blanket that moves. I was terribly close to dosing off in there. 10/10. Granted, I can't really recommend it since you'll only end up in one of those if something is wrong with you, so I hope you never get to go into one. But if you do, take it from me that it pretty awesome.