I know I may be a little strange for saying this, but with kids that age, avoid the barred rocks... everybody has always told me how gentle and friendly that breed is, but in my personal experience, they have been the most aggressive towards people...I have dealt with several barred rocks, and even owned(note the usage of past tense) some of them, and each one( hens and roosters alike) would just as soon attack you as look at you... the Orps have a well deserved reputation for friendliness ... I have only ever dealt with one Aussie(one of the Roos we have right now) and he is a little stand offish, but not aggressive in any way...