Simple, nothing fancy but thought it was worth sharing anyways.
https://www.youtube.com/watch?v=2TfwwLwRH0E
Very cute! And I have ModgePodge! For those who might try this, the dollar store sells ModgePodge - you don't have to go to an expensive hobby store.
How strong is ModgePodge? Can you make a fairly large ghost and have it not collapse on itself?
I don't know. I've done a couple of crafty projects using MP and it holds up well. A big ghost... like 3 or 4 feet tall... might be doable. You'll need a quart of MP!