But at the same time, babytalk is remarkably widespread within a culture--though the ocean often gets in the way of a generic, international babytalk. When talking to babies, we call cats kitties and wounds (orig. AmE) boo-boos. There's (BrE) bicky for (BrE) biscuit and (chiefly AmE) choo-choo for a train. And so on and so forth.
So, when I hear Better Half or his family using new-to-me babytalk, I'm never sure if it's something that's part of their 'family-lect' or more generally part of BrE. Since there may be a natural tendency to view one's in-laws as strange ('they're a family, but they don't do thing the way my family does!'), I tend to assume that their babytalk is 'theirs' until I hear someone else use it. Such was the case with (BrE) windy-pops, which came up in the comments back here. Now, I've found another case.
When I play the game Peek-a-boo with a baby, I hide my face, then show it suddenly and say Peek-a-boo! in a sing-song voice. Sometimes I vary it and say "Here I am!" or "There you are!", which follow the same three-syllable tune. And that's the only way that I've known the game.
But when BH's mother plays it, she says Beebo! I make a mental note to say peek-a-boo twice as much later, to reassert my influence (Jealous? Moi?), and put it down to her own creativity. Then I heard BH's sister say it, and I figured that she learned it from her mother. But then...we had a picnic in hono(u)r of Grover's half-birthday with other parents and babies, and I heard another mother say Peebo! So, yet another occasion on which I learn with disappointment (but, alas, not surprise) that I'm the strange one, not my in-laws.
The Wikipedia entry on peek(-)a(-)boo mentions nothing about alternative exclamations, but the OED mentions peep-bo and bo-peep. I've also found this line from a London blogger, indicating that the variation in interjections is well known in these parts:
We've been playing beebo, peepo, peekaboo, whatever you want to call it for months.So, am I right in thinking that most Americans stick to peek-a-boo? Are there other alternatives?
And is Better Half the only person who calls hands pandies or is that general BrE babytalk? (AmE snowclone): Enquiring babies want to know! I know this derives from the nursery rhyme Handy Pandy, but I'm wondering about pandy on its own.