What is the name of the toy that in the movie Witness, Harrison Ford built for the little amish boy? It's a wooden toy that once the marble has been released it travels up and down and all around causing reactions to the force of the marble. I've seen them in all different sizes and shapes but just don't know what the name of the toy is or what they are called. Plus any help where these toys could be located and purchased would be greatly appreciated.

Is it a wooden mable labyrinth a picture of one here

The Happy Puzzle Company Ltd. More General Puzzles and Games (http://www.happypuzzle.co.uk/acatalog/More_General_Puzzles_and_Games_________.html)

I believe this is called a "marble run", although various online vendors call it marble racer or marble wizard.
Plans for one similar to the one in the movie can be found at the website for the Canadian magazine "Canadian Home Workshop". Google on "C... H... W..." Once there, search for "marble racer"