Crystal Garden - cooking recipe

Ingredients

4 Tbsp. salt
4 Tbsp. water
1 Tbsp. ammonia
3 or 4 pieces charcoal
colored fountain pen

Preparation

Place charcoal in a small disposal bowl.
Mix first 3 ingredients together and pour mixture over charcoal.
Put several drops of different colored inks on the charcoal.
Leave bowl undisturbed for several days and crystals will cover the charcoal in an interesting formation, growing and spreading every day.
The crystals will be white where no ink is used.