Created a helmet for cats. I scaled it a bit small in TinkerCAD, to fit an 8 week old kitten, it needed to be scaled between 140-150%. To fit a full grown adult cat, it may need to be scaled as much as 300%, depending on your cat.
I can't promise they will enjoy wearing it at all, but it's entertaining for a few moments.
katzenhelm.stl | 256.2KB |