In the minuscule town of Rockland, Wisconsin, near Green Bay, there is an abandoned town hall where satanists have blood orgies. As a kid we would always break into the old town hall and would feel great terror. One time there was a mannequin/doll that had light blue skin and was made out of metal. It was about 4 feet tall and very heavy, made to look like a small child. It was wearing a hockey/boxing helmet like pic related.
I stole it from the town hall for fun. When we got back to my house with it, we removed the helmet and there was a ton of cut up foam from a piece of furnature inside. the foam had crusted dried blood and the foam filled the contents of the mannequin when emptied. The face of the boy was painted over with huge blue eyes. It was gross and creepy, but I kept it for years on display in my room and had no ill effects. I even gave it to my little brother when I moved out. We lived right next to a cemetery, so we weren't easily spooped as kids.
I did a mockup of what it looked like.