Why not duck eggs they are great for using in baking, and alot of folks eat them, I don't cook them because my dh won't eat them but i use them in cornbread and breads and cakes brownies etc. the reason i am asking is because 2 girls would be better than 2 boys. I'll get you those links.
http://feathersite.com/Poultry/BRKRaisingDucklings.html
If I had more duck eggs I could sell every one. We eat them just like chicken eggs as do my customers. And for baking, yup, nothin beats them!