Just saw this Christmas tree ornament and couldn't pass by. There are many thing that I couldn't imagine as a tree ornament, yet they exist. This one is at the top of my list, though maybe because it is a very specific one.
Note: don't use it for color correction.

Lego light kits look amazing, but need to be part of home automation to really work.
Full video covering some engineering aspects: youtu.be/XMl0uvU2cz0