According to the legend, the Menehunes are the first inhabitants of the islands of Hawaii.
They are part of the Hawaiian folklore nowadays.
They are supposed to be very little people, who are excellent builders with a supernatural strength. They work at night, hiding during the day, and they are capable of building a whole super structure in a single night.
They are also said to help good people in case of danger.
If you are in any real trouble and ask for help, the Menehunes will appear and help you.