How to create a sharepoint 2010 template that will dynamically update its child sites

Question

I recently created a site in Sharepoint 2010, and I have saved it as a template. I'm able to apply this template to new sites, which is great. I can then add new data to each site individually. However, my problem is that if I want to change something on every child site, I would have to go through manually and do so. Is there any way that I can create a template that will work dynamically so that I can make changes to the original and all the child sites will inherit these changes?