I made a bunch of these snowflakes, mostly from pictures of water and sky.
They would be great on a card, but I made two of each, glued them back-to-back and hung them from my office ceiling.
You DO need to have a photo editing program that will load a Photoshop plug-in. The kaleidoscope maker plug-in, itself, is free!
Explaining it is much easier with lots of pictures so I put the whole thing up on my blog.
Here's the link:
Extreme Cards and Papercrafting: Kaleidoscope Snowflakes
Carol