When I’m feeling stumped at work, it’s nice to have something calming to look at besides my computer screen. I keep a terrarium on my desk, but these handblown radiometers would also be really cool. They’re powered solely by the sun or other light sources (yay for cube dwellers!) and I love their quirky shape. The vanes inside rotate when exposed to light, with faster rotation in more intense light and slower rotation in dimmer light.
Here’s what they look like in action: