I would probably raise any hypothetical children in the same way I was raised - I've ended up basically agnostic, although I came across the term "apatheistic" which sounds more accurate. (Not interested in accepting or denying any claims that gods exist or do not exist, lives as if there are no gods but doesn't outright reject their existence.)
I'd maybe have them christened (It's traditional, I was christened as well, I'd like to give my children godparents, and it makes it easier for them if they do decide to be Christian, which is the most common religion after all.) I was given a kid's Bible - not told "this is true, this is what happened" but just as a book with stories in, that I knew some people believed in. I also had a book with Greek and Roman myths, with Hindu legends, with Buddhist stories. I was never pushed to believe in anything in particular. We had prayers and hymns at primary, but more as a tradition than as something people actively believed. We would go sing carols at the local CofE on Christmas Eve, because it was fun and you could get mince pies and hot chocolate.
Basically, I'll raise them with exposure to multiple religions, but not make a big deal out of it. If they get interested in a particular religion and want to become active in that, I'll help and support them.