"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.
It's wonderful that so many people want to contribute to fighting aids or malaria. But, if somebody isn't paying attention to the overall health system in the country, a whole lot of money can be wasted.
We're starting to push the envelope in terms of the expectations, and you can also have your own style, personality and sense of humor, because now we're allowed to.
