I was just browsing through the SuperHands kids website and the first kid I clicked on was a little baby named Brandon. And in the little write-up about how his parents found out about Brandon's limb difference, it mentions that the doctor told them,
"Fingers are like roses. Some bloom and some don't."
Don't you think thats a good way of explaining it to kids about "baby fingers" as Gavin calls it, or "nubbins"? I like it! :)