"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.
All we can do when we think of kids today is think of more hours of school, earlier age at the computer, and curfews. Who would want to grow up in that world?