Have you ever done a spinner card?
I suppose there are lots of types of spinner cards out there. This is one version.
I made this for Sparkle and Sprinkle for their card set #402. I love this set and wanted the shell to spin around much like it might if it was washing up to shore in the water. I also used some dimensional glue on the shell to make it look 3-D. Hope you like it.
Here is a close up of the spinning shell in the cut out window.