I make my Sculpey eggs hollow. It would be much easier to make if I made them solid.Yes, I blew out Guinea eggs and filled them with wood glue. That kinda worked but the glue sometimes oozed and the eggs didn’t last that long. They were such a pain I about cried every time one fell apart or was eaten by a snake. I’ve since gone to pink Sculpey eggs, which also get eaten by snakes but otherwise last a lot longer. I like the 3D print idea! I had someone who was going to make me some but they wanted to make them hollow and I thought they needed to be solid. We couldn’t really come to an agreement as the plastic was too expensive to make solid. @alexanye if you come up with someone who will print them solid let me know! I’ve recently been using wooden chicken eggs for my chicken hens and love those. I wish we could convince someone to make wooden Guinea eggs!