First of all, it's Bat Mitzvah - two words.
I am Jewish, so I know a thing or two about Bat Mitzvahs.
Jewish people are just like any other layman you will meet. They (well most of them) love magic and are great at paying attention. Some of them may use a lot of logic and won't believe in magic at all and try to heckle you, but you say you are experienced so I'm sure you know how to connect with an audience.
Now I am not sure how religious they are, but if they are as religious as me (you probably won't be able to tell, so better stay on the safe side) then there are a few DONT'S:
1. Don't touch ANY women's/girl's hands/body of any age - This limits sponge balls, and maybe some coin work.
2. Don't make reference to religion, god, or real magic - they might take offense.
3. Don't make any sexual/love references, even with the adults.
4. Don't use any foul language. (But that should be a given, no matter who you perform for)
That's a few off the top of my head. But don't worry too much, it's basically just like any other walk around situation.