Fractal is an interesting and important phenomenon which is widely found in nature. Contrary to its importance, fractal is introduced in secondary science textbooks by simple pictures of tree branches or snow crystal without proper explanation. Here we show by annealing a binary film of Al-Au at temperatures at about 200°C a fractal shape growth can be easily observed under a microscope in real time. The paper describes a simple introduction on fractal phenomenon aggregation for high school students and how to make a simple heater for the Au-Al fractal observation.
