Kuusou Kagaku Edison

Milo is a young girl living in a small village that's located a bottom of a waterfall. The village is surrounded by high cliffs and the elders have forbidden anyone of going out to visit the world beyond those cliffs. Milo lives in this environment and helps her fellow villagers by inventing all kinds of object they need. However this peaceful lifestyle suddenly changes when a mechanical monster drops down from the waterfall and starts attacking everything that moves.