I think education is one of the greatest tools for most kids not only to expand their book knowledge, but their ability to experience new things - I think it opens more doors than any other experience I can think of.
"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.