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Activity: Invisible Ink

Making invisible ink is a lot of fun, you can pretend you are a secret agent as you keep all your secret codes and messages hidden from others. All you need is some basic household objects and the hidden power of lemon juice.


You need: half a lemon, water, spoon, bowl, cotton bud, white paper, lamp

*If you don’t have lemon, you can try using orange juice, honey, milk, onion juice, vinegar or wine.


Squeeze some lemon juice into the bowl and add a few drops of water. 


Mix the water and lemon juice with the spoon. 


Dip the cotton bud into the mixture and write a message onto the white paper. 


Wait for the juice to dry so it becomes completely invisible. 


When you are ready to read your secret message or show it to someone else, heat the paper by holding it close to a light bulb.