Chicks learn quite young how to manipulate their humans, and it looks like you're noticing! It really is true that what we do influences chicken behavior. Be careful of rewarding bad behavior, though!
It carries over to adulthood when the entire flock sets up a nerve-wracking clamor when they see or hear their human approaching. In between, they're quiet as if they didn't even exist! Why? Because they learn very, very quickly that making a din will get them treats, food and attention.
My flock listens for the click of the back door opening and they set to lobbying immediately for treats. I'm ashamed to admit, they get them. When I have a broody hen who is caged up so as to break her of the notion of sitting on eggs, she is quiet and calm until she sees me coming. Then she immediately goes into a crazed temper tantrum wanting OUT. NOW!
Are you getting the idea your chicks are smart? Better believe it!