My brother turned 30 just before Christmas. He is an artist, jeweler, and gemstone enthusiast, so with a little inspiration I arrived at a novel way to send him his birthday cash: those decade birthdays call for extra recognition, right?

So here is the 30-sided polyhedron—constructed from 1-dollar bills—that I sent him as a late birthday gift. Late as in post-Christmas. Which means that my brother’s late Christmas gifts to my family must have passed my gift to him in the mail, because we each received our packages within a day of the other.

He sent us a cash butterfly and a cash elf boot! We were both shocked and thrilled that our minds had gone to the same obscure place when we decided what gifts to send each other. Neither of us had sent or—as far as I know—even made anything like these cash constructions before!
p.s. I should note that though my gift to him was larger in volume, his was larger monetarily:)