Picked up an inexpensive cat skeleton at Home Depot that had very basic animation. Replaced the stock cheezy red LEDs with yellow ones, covered each with a round blob of clear silicone caulk and then added a thin vertical pupil. Then added a second motor to animate the tail (which was the involved part of this project, requiring a lot of modification of the OEM circuit) and gave the skeleton the classic gel stain treatment. Below is a link to video of the finished product as it will appear in my graveyard:
