Fun kids craft to help decorate for Halloween: Glue Ghosts
My daughter and I just did this craft, will post pics once they're dry and hung up.
Get some Elmer's glue- not stick.
and pour some on wax paper, use a spoon to spread it out, leave it kinda thick) in the shape you want your ghost to be.
When you have a good shape use buttons, construction paper, eyes, and other things to decorate your ghost.
Then let it dry over night, it may take longer than that depending on how thick the glue is.
Then peel off and hang around the house.
I'm thinking they will also stick to windows and other glass surfaces too- but we'll see for sure once they're dry.