Some people think that politicians are pretty worthless.  Here are some machines that actually are, Rube Goldberg Machines:
 
 
Rube Goldberg, born in 1883 – died in 1970, was a car an American cartoonist who received a 1948 Pulituzer Prize for his political cartoons. He is best known for his series of popular cartoons depicting Rube Goldberg machines, complex devices that perform simple tasks in indirect, convoluted ways. The Reuben Award of the National Cartoonists Society is named in his honor. In addition, there are several contests around the world known as Rube Goldberg contests which challenge high school students to make a complex machine to perform a simple task.
 
Professor Butts and his inventions<

The works which would lead to his lasting fame involved a character named Professor Lucifer Gorgonzola Butts. In this series, Goldberg drew labeled schematics of the comical “inventions”  which would later bear his name. In 1995, “Rube Goldberg’s Inventions,” depicting Professor Butts’ “Self-Operating Napkin,” was one of 20 strips included in the Comic Strip Classics series of commemorative US postage stamps.

The “Self-Operating Napkin” is activated when the soup spoon (A) is raised to mouth, pulling string (B) and thereby jerking ladle (C) which throws cracker (D) past parrot (E). Parrot jumps after cracker and perch (F) tilts, upsetting seeds (G) into pail (H). Extra weight in pail pulls cord (I), which opens and lights automatic cigar lighter (J), setting off skyrocket (K) which causes sickle (L) to cut string (M) and allow pendulum with attached napkin to swing back and forth, thereby wiping chin. After-dinner entertainment can be supplied with the simple substitution of a harmonica for the napkin.

http://en.wikipedia.org/wiki/Rube_goldberg

Another Rube Goldberg Machine:
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