Spiral puzzles

This is a collection of puzzles based on a common theme. Some are fine in a single color, some are better with a color switch part-way through printing, and some work much better with multicolor printing.

There are three basic puzzles:
* A cube that sits on a base, assembled from four spiral parts and a base. I recommend printing two of these in different colors. By interchanging spirals you get two cubes with bases, each containing two spirals of each color. These can be assembled in two different ways; disassembling one and assembling it as the other is a good first step.
* A cube that sits on a base, in multiple colors. This is assembled basically the same as the above puzzle but requires attention to the diagnonal color stripes to align them.
* A pentagonal prism made from five spirals, with a pair of end caps that snap together using a triangular post. Although this puzzle is nicer with the end caps in one color and the spirals in another, and prettier if the hand pattern ca