Hi my name is rainbow and I got 2 new kitty and I don't know the sex of them can some one help me?

That is a question for your mom , dad or adult you live with, not one for us to discuss on this forum.

How old are you? How old are the kittens?

If you're parents haven't explained the difference between boys and girls, then it's not our place to do so.

However, if the kittens are really young, it can be very hard to tell. Sometimes, even vets will be wrong when sexing young kittens.