My kids are scared of her! She doesn’t back down at all. What should we do with her? They won’t even help me clean the coop anymore.
For now, I would just clean the coop yourself.
Depending on the age of the kids, I might just let them watch from a distance they consider safe. Sometimes time and exposure is all it takes to resolve the situation.
Or I might teach them to pick up and hold the chick in question. That might make her less scary because she's not walking around approaching them, and also because it helps them realize how much bigger and stronger they are as compared with her.
I am assuming you will move the chicks from the small coop in the garage to a bigger coop at some point. That might cause different behavior in the chickens or the kids or both.
If there continues to be a problem, you might have to choose between getting rid of that chicken, or doing all the chicken care yourself without having the kids involved.
Even hens can peck pretty hard when they want to see how a finger or a freckle tastes, so it can be reasonable for kids to be wary of bold chickens. Long pants and sturdy shoes are good for protecting legs and feet, and I wouldn't encourage anyone to get their faces close to a chicken if they are uncomfortable (or maybe even if they are comfortable!)
100% female. Black stars are a sex linked hybrid, females are black with color leakage. If she were a cockerel she would have white barring.
Assuming the chick really is a Black Star, I agree.
But there are plenty of breeds with black males (no white barring), and I have no way to tell if the store got them mixed up.
The gold/brown color in the chest is much more common in females than males, so I think the chick probably is a female, but there are a few mixes that can give males with that effect.
So I wouldn't worry too much for now, but I would continue to watch the chick's development and behavior.