Anybody have any aluminum gadget ideas?

Something small / simple to build and hand out with cards?

Looking for something someone will keep on a desk or in the shop, pen holder maybe. Cards alone just don't cut it.

Going to have some free time by working 4/10's in the coming months.

Welded razor blades are cheep but don't help with aluminum and probably get tossed.

Maybe some of you engineering artist have an idea?