The best thing is was that I got to know him very soon, while my peers and their daughters/sons still were kind of communicating.
Singing made fuck all difference in that case (FWIW, the grunter is now totally fine as an older kid). Both were walking at 10 months so it was not like one was just "slow" at their milestones
As they say, every baby is different.
That said, I believe it's nature and nurture in the end.
That made me chuckle.
But it's possible for siblings not to share any genetic material right?
A brother and a sister would obviously get different genes from their father and presumably there would be a 50/50 chance of them getting different genes from their mother.
There's four unique prototypes of children any two people can produce together.
Kinda but the mother always provides the mitochondria.
But yes, that's a good distinction I should have made!
gp said four unique prototypes
Our oldest was talking in full sentences at 1 year. It was astounding. Now, granted, it was stuff like, "I'm dunna det da fwad" but he was communicating in full thoughts at about the time he walked.
People always asked what system we used for teaching him. Our answer was always, "it's boring at our house so we talk a lot."
Most people talk to their babies at least sometimes, but observing families there are huge differences between how much people talk to their babies, how they talk to them, what subjects they talk about, how many different languages they use, etc.
The younger of two had speech problems.
Then they returned home and the neighbour kids made both of them to talk in a matter of weeks and months.
My career as a singer-to-babies was heavy on the Broadway tunes. "On the Street Where You Live" was big.