In early 1987, Purdue University in Indiana started the annual National Rube Goldberg Machine Contest, organized by the Phi chapter of Theta Tau, a national engineering fraternity. In 2009, the Epsilon chapter of Theta Tau established a similar annual contest at the University of California, Berkeley - wikipedia 
Rube Goldberg machine designers participating in a competition in New Mexico - wikimedia
The __Rube Goldberg Machine Contest__ is a contest in which students ages 8-18 build devices to complete a simple task in a minimum of twenty steps and a maximum of seventy five, in the style of American cartoonist Rube Goldberg. The contest is held both internationally and during the Covid-19 pandemic, digitally. Live regional contests and local and regional winners are eligible and invited to compete in the national contest - wikipedia
YOUTUBE YCDbiAhxJ4M 200,000 Dominoes - The Incredible Science Machine (2015)
Since around 1997, the kinetic artist Arthur Ganson has been the emcee of the annual "Friday After Thanksgiving" (FAT) competition sponsored by the MIT Museum in Cambridge, Massachusetts. Teams of contestants construct elaborate Rube Goldberg style chain-reaction machines on tables arranged around a large gymnasium. Each apparatus is linked by a string to its predecessor and successor machine. The initial string is ceremonially pulled, and the ensuing events are videotaped in closeup, and simultaneously projected on large screens for viewing by the live audience. After the entire cascade of events has finished, prizes are then awarded in various categories and age levels. Videos from several previous years' contests are viewable on the MIT Museum website.
The Chain Reaction Contraption Contest is an annual event hosted at the Carnegie Science Center in Pittsburgh, Pennsylvania in which high school teams each build a Rube Goldberg machine to complete some simple task (which changes from year to year) in 20 steps or more (with some additional constraints on size, timing, safety, etc.).
On the TV show ''Food Network Challenge'', competitors in 2011 were once required to create a Rube Goldberg machine out of sugar.
An event called 'Mission Possible' in the Science Olympiad involves students building a Rube Goldberg-like device to perform a certain series of tasks.
The Rube Goldberg company holds an annual Rube Goldberg machine contest.
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