I'm pretty sure those toys with the long curvy wires and rings that run through them just manifest from thin air into hospitals and dentist's waiting rooms, nobody has ever made or purchased one, they just show up outta nowhere. Very cool theme, you get the feeling that these toys don't really bring any joy to the boy.
I had a lot of trouble with rotating the blocks, it felt like I had pretty much no control at all, so the toy of getting all the blocks into one box felt more like gambling where I'd just spin a block quickly, pray it goes into the hole somehow, and reset if one fell behind the box. And you can break a few of the other puzzles entirely, like the one where you try and get a yellow peg to the end of a maze can be solved by ripping all of the black pegs out of the frame completely, or phasing the yellow peg through the walls to the end.