See child account activity in parent account view

It would be great if you could see child account activity in the parent account view.

I know that there is the OrgChartHub tool but the purpose of this tool is to visualize the organization, not showing the activity of child accounts under the parent.

Rather than all associated contacts, deals, emails, attachments and other activities logged remaining on the company records only, it would be great if these items were logged on both parent and child company records.

This would be so useful for maintaining clarity and transparency between reps on a team and making sure rules of engagement are followed.