To dream that you are a small child again suggests that you are feeling the burdens of adulthood. You are trying to escape from your daily responsibility and are looking for someone else to shield, protect and care for you.
"I don't know why we all hang on to something we know we're better off letting go. It's like we're scared to lose what we really don't have. Some of us say we'd rather have that something than nothing, but the truth is to have it halfway is harder than not having it at all. The paradox is that in letting go instead of holding on, you're much more stable."