What happens if they adjust the water to baking soda ratio? Will vinegar work instead of lemon juice? What if they do it backward and write in lemon juice and then add baking soda? The experimentation is endless! If they really enjoyed this activity allow them to play with different safe acids and bases to create their own formulas.This will require an adult's assistance so that they do not accidentally burn themselves or catch the paper on fire. If you are having trouble getting a chemical reaction another option is to write a message in lemon juice, let it dry, and then expose it to a mild heat source such as a lightbulb or stove burner by holding the paper next to it. Sometimes experiments fail, it is the nature of science.If they are impatient for the paper to dry, you can quicken the process by outing it in a sunny place or even using a blow dryer.This could be a fun way to encourage little ones to practice writing their letters!.Most acidic liquids should work for this activity with varying results. If you do not have lemon juice you can substitute a different acid such as grape juice.Remember you can use invisible ink to send a top-secret message or even to hide a treasure map! What you'll need: This quick DIY will have you and your child communicating through endless secret messages while learning how acids and bases react with one another. Invisible ink isn’t just for spies - you can make it at home with 3 simple ingredients! Explore one-way invisible ink is made and the chemical reaction that makes it possible.
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