There are some the believe that quite a bit of cognitive development happens between the ages of three and five, then there are others that think the 10-12 age is pretty significant. Both answers are really true in different ways, and even new research suggests that adult level of learning are happening at ages 11 and 12.

How do children's brains grow and at what rate does adult learning become possible and achievable? Before that voice changes and those hairy messes start happening.

MRI research is being done on super-healthy kids from super-healthy families, which is a chore since keeping subjects from moving without sedation (not allowed) can be tricky. But, the results are showing interesting results in how fast the brain develops -- even by the age of 12.