David Swisher, a McCook Senior High sophomore who created this "Rube Goldberg device" last year as a freshman, looks up as a bottle of water ascends to the top of an auger. The public is invited to attend and watch the 2005 Rube Goldberg competition Thursday from noon until 1:30 p.m. in the junior high cafeteria. MHS science instructor Steve Nicholson describes a Rube Goldberg device as a machine that does a very simple task in the most inefficient manner possible. Each machine created by Nicholson's students must include a screw, lever, wheel and axle, pulley, wedge and inclined plane. Judges will select first- second- third- and fourth- place winning machines, which will then be displayed in the lobbies of local banks.