"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.
I'm not sure what I want to do when I grow up, or if I'm sure I ever want to grow up. I'm sure there are people that wish I would, but you know, my mom will get over it.