Unlike Esa Helttula's other apps, which allow kids to practice specific skills through a no-nonsense kind of interface, Esa's latest app, for the iPad, gives kids a playground of sorts to play around ...

KASHIHARA, Nara -- A wooden tablet unearthed in 2001 from the ruins of Japan's late seventh to early eighth century capital Fujiwara-kyo here was part of a multiplication table chart used by ...