You don't want to be yet another guy with a generic piece of decoration sitting on your desk. You know, a stress ball or those clacking ball things. You're a unique and beautiful snowflake, so you should get something equally unique to sit on your desk.
The Desktop Stirling Engine is a nifty little device that's "powered by the expansion and compression of air when heated and cooled, [using] the same simple yet elegant dynamics as the stirling engines from the Industrial Revolution." It'll sit on your desk, whirring away quietly as long as you have the alcohol burner lit. It's a beautiful, handmade homage to a simpler time, one that'll act as a lovely distraction as well as a distinctive piece of art to put your stress-ball-toting co-workers to shame.