Sure looks like the same boy, wide-wristband watch and hair style. Who is the little girl?
His sister Maya
With all due respect, I don't think I agree with you.
In the 1970's, those wide wrist bands were the in thing. But look carefully at these two--the one on the boy in the airport has edges that extend well beyond the watch face; the one on Obama does not. Different.
He's thinner--look at the arms and ankles. His mouth is narrower--clearly much narrower. His nose is narrower.
Obama is just not the boy in the airport picture.
The picture I do have difficulty with is the family picture on the couch in Indonesia. If the boy there is presented as Obama, he doesn't look like either the yard picture here or the family Christmas picture from 1971.
Also a problem is the lack of an explanation for the half-brother being in Honolulu in 1960. They really got married in Honolulu and the half-brother son came for the wedding? If so, we ought to find the wedding somewhere and it will make it more difficult to put Stanley Ann in Kenya in that time frame although I remain of the view that likely that is where she went.
Incidentally, the little girl is the Indonesian half-sister who is now one of the primary sources of information and pictures.