Rainbow Milk

We placed 4 drops of different coloured food dyes in each corner of a saucer of full-cream milk.  The fat in the milk held the food dye in placeWe then put a little bit of detergent onto the end of an ear bud and placed it in the centre of the dish.  WOW!!  The detergent broke the seal of the fat and the food dye started to disperse creating RAINBOW MILK!!