Homemade Ink(This Recipe Is Dedicated To All Teachers Everywhere.)  
["walnut shells", "vinegar", "water", "salt"]
["Crush several empty walnut shells into very small pieces.", "In a saucepan, cover the shells with boiling water.", "Simmer until the liquid is very dark brown.", "Add some salt and vinegar (this will \"set\" the color).", "Strain the ink through a piece of cheesecloth into a jar.", "You can use this ink in any pen that dips or fills with ink."]
["walnut shells", "vinegar", "water", "salt"]