Are you seeing any strange behaviour in your page when you open it?

As you are a new AEM Developer (I assume you are a developer) - you should go here and complete this:Getting Started with AEM Sites - WKND TutorialThis will get you up and running in AEM.

This is an older article - but sounds like what you want to do. Build content in AEM - ie a newsletter and use Campaign to mail it: Adobe Experience Manager Help | Integrating Adobe Experience Manager and Adobe Campaign Standard to create Newletters

Are you seeing any browser or log error messages?

Excellent reply Arun!

Also best practice to model your components based on the core components.

Is the outer component the responsive grid?

see the weekend tutorial for info on editable templates, components, and best practice around responsive grid --Getting Started with AEM Sites - WKND Tutorial

Your authors should be working with components (adding, modifying, nd deleting) at page level. The components that an author works with are defined within the policies in editable templates. This reflects best practice.Only components set in an editable templates are fixed components that an author ...

You can look at writing a JCR event handler. When child page is created, the event handler can fire and add a prop to meet your requirement.