In the game Little Inferno there is this weird character in the background that I honestly don't understand but I liked it so I designed it. The gears rotate and its mouth opens and it's soulless yet always looking at you, just like in the game.
58.95mm x 67.92mm x 16.80mm in size and the tolerance is really forgiving so it should print well if you don't resize it.
Make sure not to break it when you free the gears and mouth, it can be a little fragile.
Also make sure to increase top solid layers so it will look right over the slope. I doubled mine to 6 and it still wasn't perfect.