There is also another nanny that takes care the same kids on other days. She also doesn't treat very well the kids. It is just the way they do, like the kids are animals, they don't talk to them nicely, they do it sometimes when they want to show in front others moms, but when most of the adults at the park are nannies they don't care and they act totally different.
Not all the nannies there are like that, there are some that are really great with the kids. I think that the parents need to know and maybe send somebody the nanny doesn't know to check. I think the parents sometimes forget that their treasures are in other hands and they need to be sure.
I spoke at length with the OP and feel that she is genuine in her concern over the way some of these children are being mistreated. If any parents from either park know of these Nannies, please send someone to check on your children.