"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
Obviously, our children, who have been playing with their computers since the age of five or six, don't have quite the same brain as those who were brought up on wooden or metal toys, whose brains are certainly atrophied by comparison.
