I am a huge fan of Rube Goldberg Machines, the creativity behind them is always fun to admire.

What is a Rube Goldberg Machine you ask?

Wikipedia tells us:

Rube Goldberg machinecontraptiondevice, or apparatus is a deliberately over-engineered or overdone machine that performs a very simple task in a very complex fashion, usually including a chain reaction. The expression is named after American cartoonist and inventor Rube Goldberg (1883-1970).

Here is a cool video entitled "The Page Turner" that implements this design idea: