This polymer clay egg is hollow, and the light can shine through to the interior. I used some translucent polymer clay and some colored clay and made a daisy cane which i applied to the exterior of a whole chicken egg (well, emptied but a whole shell). After curing i punched out the uncovered egg shell and removed the rest of the shell in white vinegar (many hours) and sanded the interior of the polymer clay (and exterior). This one is coated with varathane. I am having fun with this technique, and the sky is the limit.