"Low threshold activity" is a good point.

While editing the mouse pointer of a modern-day OS is pretty much inaccessible, the "cursor" CSS feature in the major browsers immediately felt low threshold, accessible and fun again. Changing the "real" mouse pointer via CSS! Only on a website, but cool nonetheless!

That little fun feature alone helped getting this project off the ground. I tried to make my adaption of the pointer editor low threshold, too! :)