$20 prop contest ideas

I am still searching for ideas for the $20 prop contest, and I have a couple brewing. The first was originally inspired by this post I found on pumpkinrots site, the image is by rainbowzebra93:
What I like about this is the long flowing ghost, it also led me to the idea of using some form of black mesh to build a very 3 dimensional form, the leave lots of gaps in the cheese cloth to give the impression of a very hollow ghost. Kinda like a previous ghost I built, but with more voids to give the impression of something hollow.
The second idea is for an animated ghost with more of an emphasis on the sculpture than I usually do, and with different animation using a lot of cams with a deer motor. After all, it is a $20 prop contest, and you can make a lot of cams with scrap wood. The basic movement is based on one of my all time favorites, the Green Ghost from Scooby Doo. I would try some ideas I have had to build a very detailed armature from paper mache, give it a basic posture like in the Scooby Doo ghost, and then animate it as much as I can using a deer motor. Another image I want to incorporate is by (Divinity II: Ego Draconis Art & Pictures)
Next step is to sketch something out and start planning the animations.