It really all boils down to which child was born in Hawaii, and which child Mary babysat in January 1961. The family group shows the kenyan with Ruth, and she's holding the half-black child which is Mark, who was born after she went to Kenya in late 1964. So Mark, although he hasn't actually said so, was born in 1965.
That leads to the question, who is the dark boy who is tall enough to reach her waist, in approx 1966?
If he is, as he appears to be, the same dark child sitting next little zero, then those two little boys were both born in the same year, the dark child being just a little older, and somewhere, somehow they were in the same place at the same time...one could assume in Boston, which is where Stanley Ann Dunham told Susan Blake she was going that very same day of her visit... And that's why the kenyan was able to tell friends at Harvard he was visiting his son. Which is what led the Harvard faculty to believe he had 'another wife' in Boston.
The dark child went to Kenya and lived with his father and stepmother. And the lighter boy shows up aged about two, with Stanley Ann Dunham in Hawaii, in 1963 in a photograph, when legend has it, she took him to the zoo.
