[math-fun] continuous Galton board

Bob Baillie (rjbaillie@frii.com) writes:

one had ping pong balls (or marbles?) falling down through a grid of pegs that caused the paths to become random. at the bottom, a bell-shaped curve gradually formed as more and more balls collected there.

Could one make a Galton board modeling continuous deterministic flow (as opposed to discrete random flow), using a liquid? And has anyone done this? I picture a triangular array of buckets, with water being pumped into the the top pocket, from which water overflows into the two buckets beneath it on either side, from which water overflows, etc. Jim Propp