Applause Machine
Turn the handle, and soak in the applause. Maybe you aced a test, or you told a good joke. Whatever the reason, you deserve it.
My first attempt at a complicated design. The tolerance on my printer isn't so good, so I had to design all the connections with this in mind.
Designed in OpenSCAD. Printed on a 6" Prusa i3 (Makerfarm).
I may make some modifications to make the arms a little more stable, but it works pretty well as is.
Here's a video of it in action:
https://www.youtube.com/watch?v=s9paA0o07t4