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Ingredients
- 2 or 3 lumps of coal
- 2 tablespoons water
- 2 tablespoons salt
- 2 tablespoons liquid bluing
- food coloring
Preparation
Step 1
Put the coal in a shallow bowl, mix water, salt and bluing together and pour over top.
The next morning, add 2 tablespoons more salt.
Third morning add salt, water and bluing and a drop or two of food coloring.
The crystals will grow.