We grew dinosaur eggs this year. It's an egg shaped gourd. Ours turned out to be chicken size eggs. I plan on selling them for easter decorations as well using them in my nest boxes. I use fake eggs sometimes to get the chickens used to a new nest box and sometimes to prevent them from pecking at the eggs. It also seems to fool various critters, that try to steal the eggs.
Actually... my dad ordered the chicken ones and duck ones from Eggcartons.com for Christmas I get the duck ones for Xmas, but the chicken ones I can have now. The UPS man called us from the end of our driveway today (LOL he can't get up it, not only because the truck is there, but also the driveway is just too bad), and we walked down to get our order