Video of a 10-year-old girl in Thailand taking notes in class while feeding her baby sister a bottle of milk has tugged on the heartstrings of millions in the country. On May 20, a primary school ...

In fact, gesturing seemed to trump age when it came to the sorting performance of the children, who ranged from 2 and a half years old to 5 years old. In the color versus shape task, as well as ...