How to click on page link and get another page to show

We have a navbar structure based on the top-most pages (ie those that dont have parents themselves). One for products, services, etc. Each has several child pages, typically features, download, sys reqs, etc.

The sidenav has this structure;

Services
– Features
– Download
– System Requirements
– Support

etc.

Is there a way that, when the user clients on the Services link, they get presented with the first child page (that is Features in this case) ? The same would happen when the click on the Services link on the top nav.

At the moment the services page is literally just a page with links to the features, download, sys req page. Basically, it’s not needed, but I want the intuitiveness of having the navbars made up of the parent pages.

Does that make sense?

Olly