- a saucepan
- a spoon
- salt
- water
- food coloring
- pieces of string
- a cup
- a plate
- Bundle your pieces of string at one end with a knot.
- Bring the water to a boil, add some salt and a couple drops of food coloring.
- Keep adding salt until no more salt dissolves.
- Pour the mixture into a cup.
- Hang your knot in the salt water and let it sit for a couple of days.
- When you come back to it you will have colorful crystals
How's it work?