A Push Puppet named Eeps

Push puppets are around as long as I can remember and I've always loved the simple yet smart, funny and inspiring little toys.

Making push puppets has been on my mind for quite a while, but somehow I never got to it. Until now. Until a MakerBot Replicator 2 appeared on my desktop (literally!).

Here's a question: For this model, I used a regular steel spring from another push puppet. It would be great if the spring can be printed with the other parts. If you have ideas for printing a spring for this toy, please drop me a line!

I have some, but ancient, experience with 3D modeling (from the '90s!! I'm getting old). The 3d shapes that make the push puppets parts are very basic, and so are the operations on the shapes.