This is really cool, a machine adds 441 water drops to a special surface and the water drops are almost perfect sphere. See the video below

Falling objects - positioning systems from 2009-2011 is an custom made machine that adds drops of water onto a special textured surface. Each drop forms into an almost perfect sphere through the surface tension of the water and the omniphopic Material. The electronically controlled pipette wanders through a square grid of 21 x 21 drops to form a micro-matrix and returns to the beginning. After approximately 300 minutes, and when the  water drops have evaporated, the same process starts again.

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