I enjoy magnets and have too many, from lodestone to neodymium. Very curious as to how you use them?
I think a fun-filled science class?
Ephemeral creations, like 3d etch a sketch?
Sewn into a blanket to cure lumbago?
Here's something I put together some time ago.
https://www.zeugmaweb.net/bucky/
I've come up with some insanely complex stuff since then. Probably ought to document it on this page, but I haven't bothered.