From Studica:

Using only fischertechnik parts, build a machine of any type or any size. The machine must perform some sort of action, or ‘work’, but it is up to you to decide what that action is. The machine can perform a useful task, such as sorting something by color, or it can do something that is just ‘for fun’, such as moving balls around a multi-level maze. The emphasis should be on building something with motion that is visually appealing and shows off both your creative and mechanical skills.

In case you happen to be unfamiliar with Fischertechnik: