Crystal Garden
["6 to 7 charcoal briquettes or stones", "shallow bowl", "6 Tbsp. salt", "6 Tbsp. laundry bluing", "6 Tbsp. water", "1 Tbsp. ammonia", "food coloring"]
["Note: Bluing may be hard to find.", "Look in laundry section of grocery store.", "Blue bottle next to starch and bleach products."]
["briquettes", "shallow bowl", "salt", "laundry bluing", "water", "ammonia", "food coloring"]