Since Easter is coming up, I thought an egg-related project seemed appropriate. I have some good sized hen's eggs too, so I got to work on one of them last night.
I've glued tissue paper to the inside and outside of the shell, and added some veins made from twisted paper. Covering the shell in tissue paper strengthens the shell, but it also gives a nice leathery effect. Bird eggs have hard shells, but reptiles often lay eggs with flexible, leathery shells, and it's this kind of look that I want to play around with.