Display child page content in parents sidebar?

I’m currently using “Widget Logic” and simply using the text widget, but I was hoping that there might be an easier way. What I’m looking to do is have a widget that simply says something like “Choose page to include” and heck, I’d be fine continuing to use Widget Logic for a widget like that. So, for my clients home, about, contact pages, I’m displaying plain text on each page, using widget logic, it works great. But what I’m looking for is a widget that allows me to select a page/post and that content would take the header and use that and also use the content to be displayed in the sidebar. I’m not looking to really do much coding, but rather would like an widget recommendations. I’ve tried about 6 widgets that are “suppose” to be able to do something like this, but no luck. Any help would be much appreciated so that my client if wanting to update “News & Updates” on the home page, they could edit a page rather than navigate to the widgets and change it up there.