What a beautiful cat and she's only 6 months old so if she has Maine Coon in her she might end up being a lot bigger.
You know, even if she doesn't protest, it's not a good idea for your kids to hold her like that. It could actually cause injury and it might be painful for her. I think maybe you should talk to them about how to properly hold a kitty.
Oh and don't forget to have her spayed ASAP if you haven't done so already. At 6 months old, if she's not spayed she could get pregnany pretty quickly this kitten season.Why you should spay/neuter your cat