Or to teach them about other religions equally (including your own ) so they would be able to decide for themselves.
There isn't a problem with teaching your kids your own faith, but it shouldn't be overly forced. I also think you should tell them about other faiths, because as they get older it's going to be confusing, I remember being 7 and not understanding other religions, even other sects of Christianity.
By 18 they should have the freedom to explore for them self.
Would you really expect to understand other religions by age seven?
Well, I remember being 7 raised, non denominational in a very catholic area.
I remember friends/peers going through first communion (Catholic) and I was very confused on when I was suppose to do that myself.
I think it's important to a parent to address that, kids aren't stupid.
I remember asking "If Lucifer knows Gods word, he knows he's going to loose, so why doesn't he repent?" - I was about 4 when I asked this shenanigans.