In this blog post on the NY Times, the author discusses new research around the benefits of meditation for children:
These investigations…illustrate how meditative practices have the potential to actually change the structure and function of the brain in ways that foster academic success.
Fundamental principles of neuroscience suggest that meditation can have its greatest impact on cognition when the brain is in its earliest stages of development.
This is because the brain develops connections in prefrontal circuits at its fastest rate in childhood. It is this extra plasticity that creates the potential for meditation to have greater impact on executive functioning in children.