Ping
The dark child appears to be about 7 (Seven) months older than the other. If you trust your eyes and not the misleading captions, who they are becomes clear.
“Saman said that when Barry failed to finish homework sent from Hawaii by his grandmother, Ann would call him into his room and would spank him with his fathers military belt. President Obama, through a spokeswoman, said his mother never resorted to physical discipline.”
http://www.truthout.org/obamas-young-mother-abroad/1303494379