With my boys I expected to avoid story time because the wandering and asking questions would drive me crazy!
I'd rather just go to the park or children's museum where that behavior was what I expected to happen, instead of story time where I would always hope that they would just sit and listen for a few minutes. I don't think there is any reason an 18 month old has to sit still and listen, unless they want to. There are just so many other things to be doing that if this isn't working do something else.
If you don't mind what is going on, then just do what ever she wants. If it is too frustrating, then there is no reason she has to go to story time.
I'd rather just go to the park or children's museum where that behavior was what I expected to happen, instead of story time where I would always hope that they would just sit and listen for a few minutes. I don't think there is any reason an 18 month old has to sit still and listen, unless they want to. There are just so many other things to be doing that if this isn't working do something else.
If you don't mind what is going on, then just do what ever she wants. If it is too frustrating, then there is no reason she has to go to story time.