ok... so jumped in and drew a really quick pic using photoimpact.
keeping in mind it's got to be something that is not cost prohibitive... i tried for something a little more on the simple side?
my idea is based on the twilight zone's original tv show where the creature pulls up the airplane's wing's panel and pulls out the wires.
see pic... a wood box perhaps covered in metal like panels with rivets, the box would be convexed (curved outwards) on the top and bottom mimicking the wing of an airplane.
(it'd actually rock when set flat - or could be stood on end)
on one side the "metal panels" could be ripped upwards revealing the wires to the wing.