Agree with Az...I bought six day old Australorp chicks and my family handled them daily. They were all hand-tame (still are at 4 months old, just not quite as cuddly - but definitely not standoffish).
I rescued a bunch of maybe four-month old chicks from a lady, and these birds were all terrified of people. After quarantining the new bunch, I added them to my around 4 month Australorps in their huge brooder. They got along fine, and eventually the new scaredy-cat birds allowed us to feed them treats.
Now, Snowball, an English White Orpington is so disgustingly friendly she'll let you do anything to her. She originally was extremely scared and actually drew blood from my hand the first time I picked her up.
My kids and I just gave them plenty of space, never rushed into picking them up, and eventually they all warmed-up to us, aside from Mocha (one of the prettiest ones - we think she's a Jubilee Orpington - she isn't afraid of getting near but won't allow us to hold her without flapping).
Keep at it, they'll warm up to a certain degree.