I used masking tape to cover their hair and eyes and sprayed them like crazy with white spray paint.
After the paint dried I used a black sharpie to creep them out even more.
Draw black circles around their eyes (they already come with creepy red eyes)
Randomly place stitches over their bodies
Wildly tease their hair
I'm not entirely sure what to do with them from here. Perhaps tie fishing line to their backs and make them fly in the corner of your living room?