"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.
Wise men should always bring up their sons in various moral ways, for children who have knowledge of niti-sastra and are well behaved become a glory to their family.