Carefully review the general safety advice on the back of the box cover before starting the experiment.
Never eat or drink any of the substances provided. Do not use for culinary purposes.
Perform the experiment on the safety tray and use protective gloves to avoid staining your hands.
Pour liquids down the sink. Wash with an excess of water.
Dispose of solid waste together with household garbage.
You were able to create this beautiful picture thanks to the interaction of two liquids with different viscosities! The red liquid (PEG-400) is highly viscous and consists of large molecules bound together. Under the plastic disk, it spreads out in a circle.
The colored water (blue and burgundy) from the bottles, however, has a lower viscosity. It is fluid and consists of small molecules bound loosely to each other. The colored water spreads in a circle, then breaks off in different directions, forming a snowflake inside the red liquid .
Under the plastic disk, the molecules of the liquids behave like cars in a traffic jam. The molecules of the colored water from the bottles are cars, and the molecules of the red viscous liquid from the syringe are huge, lumbering trucks. The trucks create a traffic jam around the cars and do not allow them to pass. With the help of the bottle nozzle, we create pressure on the colored water, and it pushes the car-molecules towards the truck-molecules. That’s why as soon as there is a space between the trucks, the cars immediately fill it and continue to make their way further, driven on by the impatient cars behind them.
Dozens of experiments you can do at home
Kids are now able to engage with science in a way that they simply wouldn’t have been able to in the past as they shrink themselves down to see the world at a molecular level