These are rescue kittens in a rescue pen. Not an ideal start in life, if you want a cat that is confident around human beings. I am sad that so many rescues are still keeping kittens (with or without a mother) in a pen.
Kittens need human contact - a minimum 20 minutes daily preferably from a series of different humans. Not just women, but also men and sensible children. But that is the minimum.
I was lucky I was brought up in a home, with all the noises and smells of a human home, with people coming and going, and with a friendly dog. The ideal education for a pet cat.
I was used to all these things before I went to my new home, so I settled in quickly. Kittens that are in a pen miss out on the smells and noises of a human home, and some of them don't get enough human contact.
Purrlease tell you human to get their rescue kittens fostered in a home, not a pen.