my comment from fb
salam. ( i think: ) little girls must not wear hijab according to islam alims . but that is based on weak hadith http://sunnah.com/abudawud/34/85 . march 9 , 9:52 utc+4 : i think , i have made some mistake: abu hanifa lived before hadiths were collected as i remember, and, even if duraik did not see aisha, maybe (i do not know) , very many people did hear that from aisha , for that that transmitter is not mentioned in the hadith. march 11 , 5:58 utc+4 : if the last proposition would be true, there would be many copies/versions of the hadith, not only by duraik.
see also my question about this topic: https://islam.stackexchange.com/questions/47375/were-muslim-girls-covered-with-hijab-at-prophets-time-and-little-later