The Face of Slavery & Other African American Photographs -- American Museum of Photography. This is not a problem with pinners but with missing the caption on the original site which notes it dates from the and thus these are not slave children.
Alberta Jones- A civil rights and voting rights activist and the first female prosecutor in Kentucky. Jones was also Muhammad Ali's first attorney. She was murdered at the age of 35 and the case was never solved.
Clark Doll Test, The Clarks gave black children in integrated and segregated schools two dolls that differed only in skin color. The black children consistently said the white doll was prettier, better, and the one they wanted to play with.