Perpetuum Poster

A poster i made some time ago for a engineering contest i organized in my faculty.
The idea of the contest was that 7 teams each having between 3 and 5 members, are given a mysterious box with a ton of random things. They have 6 hours to create a complex Rube Goldberg machine, also known as chain reaction mechanism which must complete some random task that they find out in the morning of the event. The twist is that the have to use somewhere, somehow the arduino developing board that they receive inside the box.
Last year they had to build a machine that "wipe your face" .