Socialization

Hey everyone Tehya's kittens are now at the age where they need to be socialized with people and other cats. I've chosen which of our other 3 cats I'll introduce first, but how do I proceed in doing this? Do I take mom out of the room, and put Sierra (she's probably about 11 years old, Persian very sweet-natured) in the box with the kittens? Do I let mom stay? Tehya is a first (and only) time mom, so I'm worried if she does stay in the room she might get protective and chase Sierra away. Any advice for "socialization time"? Thanks!
Laurel

I'm not sure, but it makes sense to me to leave Tehya with the kittens, and see if she will let Sierra in.
My kittens turned 4 weeks old yesterday, and it is surprising how much more active they are at 4 weeks than 3 weeks. I don't think it will hurt anything if Sierra won't let other cats near her kittens yet. Are you spending time with them? Keep socializing them to people. I think by them playing together, they are socializing to cats. You do not want to upset Tehya and make her uncomfortable, so let her set the pace IMO.