'Children' will only show up on the nav bar if you select 'Show on Navigation Menu' on the Info tab. Instead of doing that, when you create a 'child', put the parnt name in the box named 'this page is a subpage of:'
All 'children' entered like this will be under a common parent but can still be published in the footer, if you wish, by checking the relevant box.
If you want a drop-down menu in the nave bar, search under that bame in this forum and you will find various comments on how to do this.
Make your backlinks relevant and one-wayhttp://beam.to/neurolinker