What is a chain reaction machine ?

The name "Rube Goldberg machine" is derived from the American cartoonist Rube Goldberg, who often depicted such in his cartoons. In the United Kingdom, they are named after the British cartoonist Heath Robinson, who also drew such whimsical machines.

Chain reaction machines are usually creatively and humorously designed and often use everyday objects in unexpected ways. The components are arranged to trigger a cascade of actions and reactions that eventually lead to a simple result, such as turning on a light, closing a door, or triggering a camera.

Although chain reaction machines usually have no practical application, they are a popular subject in art, film, advertising and education. They can be used to demonstrate physical principles, encourage creative thinking and problem solving skills, or simply as an entertaining display. In recent years, online videos of chain reaction machines, called "domino videos," have also gained popularity.