PC Mad Scientist's Bag: Magic Snow Board Game

The Varázshó set from the Mad Scientist's Bag series is a home experiment kit that lets children and adults explore a chemical reaction together. The main ingredient is a snow polymer powder. Add a spoonful to a glass of water, wait a few seconds for the liquid to set, and a white, fluffy, snow-like mass swells out of it.

The material looks and feels like real snow, yet it is non-toxic and stays cold to the touch. The process is based on osmosis, during which the molecules can expand up to a hundredfold. If you leave the mass to dry for a day or two, you can watch how it changes.

For a more colourful result, add food colouring. You can also try adding salt to the water and compare how the reaction differs.