This experiment just didn’t seem to work for me when I was testing it out for Zara’s Science Party. I thought it might be the food colouring I got from Migros, as an old black one I had from South Africa worked but none of the colourful ones I picked up from their supermarket. But my friend Marta did it and said it worked great. So here are the instructions, hopefully you will have better luck than I did. (at least I could dip paper into my milk and co ordinate the “marble” look with my table!).


Whole milk

Shallow dish

Food colouring

Liquid dishwashing liquid soap

Ear Buds


  1. Pour a thin layer of the whole milk in a shallow dish.
  2. Squeeze droplets of the food colouring on the surface of the milk.
  3. Next, dip an Ear Bud in the dish soap and then in the milk, preferably in the centre of a spot of food colouring.
  4. Now, watch the colors explode all over as the detergent interacts with the fat molecules in the whole milk!