I found with my chicks (which include one SSH) that reaching my hand in and scooping them up from below so they have to hop up into my hand worked much better than last year where I would reach in and pick up the chicks from above. Also, at times when you don't want to pick them up just resting your hand in the brooder an inch or two off the floor will get them curious and soon they are hoping up on their own just to be higher than the other chicks. Mine played that game for the first week and a half that I had them. First one would jump on my fingers and then another. When the second one was up on my fingers the first would perch up on my thumb which was higher and #3 would jump on my fingers. They would move up progressively like that until I had chicks all up my arm and on my shoulder. As they got older they wanted to perch on my head but I wouldn't allow that, much to their displeasure.
I also started my chicks on grit at 5 days old and started giving them the buds from broccoli tops on day 8. The tiny green buds were perfect size for them at the time. They also got plain yogurt as a treat too. Now they are eating bigger pieces of broccoli, small amounts of bread, raisins broken in half, and boiled egg as treats. They can't get enough. I do limit them to max of one treat per day though. Some days I don't give treats at all. I want them to keep guessing when/if the treat is going to come so they don't get too demanding.
Now, at 4 1/2 weeks, the chicks of mine that are friendly (because there are several that just aren't) will pop up onto the edge of the brooder as soon as I open the lid. Those that are less friendly will still run to my hand if I put it down in the brooder since they think I might have treats. Those ones will retreat after they discover no yummy things in my hand but the friendly ones will even fly after me if I walk away from the brooder.
The SSH chick is not the friendliest but he is very bold and doesn't ever run away from my hand. He will be one to hop on my hand while I'm feeding treats, but that's the only time that he will initiate contact, as soon as the treats are gone, so is he.