For what it's worth, here's what I did:
I'm a first time chicken owner, and my chicks are 19 days old. I have two small girls who desperately want to hold the chicks, but I decided we were going to let the chicks take the lead. When they were very small, I moved toward them very slowly with a hand palm up and never from above (activates the HAWK!! instinct). A few of them relaxed enough to let me rub their chests and tummies while they were relaxing. If they moved away, I didn't press it, and we never picked them up (except for poopy butt). This was, and continues to be, hard on the girls, but I told them what the chicks want is more important than what we want. (But what do I know?)
My chicks never showed any interest in treats until I gave them mealworms, and then I became The Hand That Brings Good Things. I had them eat out of my hand only a couple of times. Around 10 days, their curiosity got the better of them, and they began to hop first onto the down-folded box flap, then right out of the brooder. I have now built a 3' x 5' run attached to the brooder opening (yes, it's inside the house...yes, I am insane; why do you ask?), and they come out of the brooder for "recess" 4-5 times a day. They LOVE it. They scream to be let out, and then they come, literally, FLYING out of the brooder. They eat treats, they fly around, they do that crazy chest-bumping thing. (They also complain like crazy when I put them back in...)
I just sit there and watch them, and a few of the braver ones hop up on my legs, roosting on my arms, a couple have even gone all the way from one wrist, up the arm, around the neck and back down the other. I move very slowly around them, and talk to them softly. My favourites compete for the best spot on my lap. It's very rewarding.
That said, I have come to the conclusion that they are probably not going to want to be held the way a dog or a cat does, and there are 6 of the 12 who are never going to come to me the way the others do. And that's okay.
So, that's my story, because I had the exact same question about 10 days ago. Let us know how it goes...