I'm starting with a simple asset. I'm uploading a simple animated snake with one animation which is a generic move. It comes with three different snake textures 1024 x 1024 and only 376 triangles. All you have to do is "Group" the rig and animate its transform and you're set to go.
Here is a YouTube video of the snake animation.
http://youtu.be/Sy9LYu4LiWg
Enjoy!