Once upon a time there was a blue boy bird and a blue boy dragon. They were really good friends and liked to fly together. Only one day the blue boy bird discovered he wasn’t a bird, he was really a blue boy dragon. And the two blue boy dragons loved each other and got married. One of the blue boy dragons had sperm and one of them had eggs, so they had seventy five hundred and two hundred and twenty five hundred babies. Half of them were girls and half of them were boys, and one of them was both and one of them was neither. The one who was both POOPED out of its shell and started dancing.
And then it was bedtime.
In related news, I enthusiastically recommend the book What Makes a Baby; very basic baby-making and where-did-I-come-from sex ed for very young children; I’d say ages 2-6, and not any younger just because it is a paper and not board book. It very skillfully avoids cissexism and heterocentricism while providing opportunities for kids to hear all about THEIR birth and family stories — which is what children this age are usually most interested in — and doesn’t overload with extraneous information about sex, orgasms, and so on. (Although I will say I’m looking forward to the next in the series that, I hope, will start addressing those issues more.)
The book is currently self-published — and very, very well done at that — with a limited supply remaining until it is re-issued by an independent publishing house, which a little bird hinted will happen in mid-2013. So if your kids are of an age, get it now; if not, make a note of the site for next year, because if you have or work with kids, you need to have this book.