This is a fully functional Slinky created in Blender 2.76. This model uses the array, curve, and lattice modifiers combined to create a very realistic (and easily animated) slinky. This model uses a unique setup and I hope you like it!
This Model is the same one I used as a demonstration in my "Create a Slinky" tutorial. In the tutorial I go over the entire process of creating the slinky; in under 10 minutes (so give it a watch!). You can find the video here https://youtu.be/8VooYlKaqnQ