Widget Plugins – Flexi Pages

The thorn in my side is the widget area of WordPress. I’m trying to use Flexi Pages plugin to only show children pages, but that isn’t working. If I only include “Media” and “About Us” it doesn’t show any of the children pages AND it shows up on other pages. (For example:https://fbcsudbury.dreamhosters.com/visiting/sunday/).

Does anyone know of a way to use Flexi Pages to just show children pages for those that I include?

Also, is there a good plugin for easily adding widgets to certain pages? I have Display Widgets but that doesn’t show up with some of my theme widgets.