i'm going crazy

My seven-year-old is driving me crazy all she wants to do is talk about babies carry her babies around and talk like a baby and now she's talking about how to make silicone babies I don't know what to do this is been going on for over year and for the last month or so it's been getting to me I guess because she starting to talk like a baby she'll be going back to school soon and I don't want her talking like this what do I do any help is there anybody out there that's gone through this any help is appreciated I don't think it's a phase it's gone too long HELP