I have a soft spot in my heart, yuk yuk, for the shell-less eggs. There is something really odd about them and I end up staring at the things for long periods of time. That and rolling them in my hands for the feel. I only get them with young hens or VERY rarely from the older hens.

Now, what would be REALLY interesting is if one of those softies was fertilized. You could put it in the incubator and see if it would grow. Could even put the egg in a plastic easter egg.