A number of years ago I and two friends of mine ended up signing up for an engineering competition. The task we signed up for was to construct a Rube Goldberg machine of a specified size (it was something like two cubic meters) that would, in a set number of steps, end up picking up a raw egg and placing it into a cup without breaking the egg. Oh, and no motors were allowed. I forget what was supposed to start it off; that, to, was specified, but everything in between the start and the finish was up to the teams building the things. I had a lot of fun putting together that contraption. Sadly, when we got it to the event, we discovered that they’d given us the requirements for the previous year’s event, and our machine didn’t meet the latest year’s size requirements. So it was automatically disqualified and we never got to show it off.