The accompanying caption said: "Thank You Kanye, Because of You I Will have a college Education ..." she added in the caption. "Mommy and I are so thankful for you and your family."
The youngster also tagged Kanye's wife, Kim Kardashian West, into her post and added the "#JusticeForGeorgeFloyd" hashtag.
Kanye, 43, has, so far, contributed a total of $2 million to George's family, and the relatives of fellow African Americans Breonna Taylor and Ahmaud Arbery, who were both shot dead by police in America.
The money donated by the rapper is for the families to pay for legal fees as they fight for justice for their loved ones.
Kanye made a surprise appearance at a Justice for George Floyd rally in Chicago earlier this month, with representatives from Good Kids Mad City, who organised the event.