We did an interesting science experiment with in the kitchen, coloured milk swirling. The experiment was very easy. We only needed a few basic ingredients that you can find in the kitchen to do it. We would see some very unusual chemical reactions took place when we mixed milk, food colouring, and a drop of dishwashing liquid. Preschooler might not understand the chemical reactions but they had fun observing and mixing colours.
You will need
Full cream milk
Food colouring
Detergent liquid
A bowl
A Cotton Swab
What you do
- Pour some milk in a bowl.
- Drop in some food colouring.
- Use cotton swab, tip a bit of dishwashing liquid in the middle of the colour drop.
- Watch the colour swirl.
How it works
Milk contains water, vitamins, minerals, proteins, and tiny droplets of fat. A basic fact of science, water (polar molecules) and milk fat (non-polar molecules) do not mix together. Detergent liquid is our emulsifier, the soap molecules in the detergent work as a bridge between polar water molecules and non-polar milk fat molecules. During the bonding time, the food colouring molecules are bumped everywhere, providing and easy and fun way to observe the invisible chemical reactions.
Preschoolers might not be able to understand those chemical reaction at the moment. The activity provided them opportunity to observe what happen, manifest curiosity, which are stepping stones to discovery in science and technology. Now it is time to enjoy. Let's watch the experiment with our children.
FYI: it's not a chemical reaction; might better call it a chemical interaction!
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