Great for games of espionage and its clandestine intelligence operations, playing private eye with its hush hush hidden covert messages, for secretly marking the X on a treasure map, magic shows, wizardry and even little love notes passed between one another.
Here's what you'll need:
- lemon
- q-tip
- paper
- a secret message
Here's how:
- Squeeze the juice of a lemon into a bowl or cup
- dip the q-tip into the juice and use it as 'ink' to write your message, a fine paintbrush would work too.
- To see the message hold the paper agianst a heat source.
Here's why:
Lemon juice is acidic, the acid in the juice weakens paper and stays there when it dries. When the paper is held near a heat source the acid will burn faster than the paper and as it heats up it turns brown enabling you to see the message that has been written.
Milk, white wine, apple juice and orange juice work too, why not try other things; see what else you could use to make invisible ink.
Alternative:
Great for younger children; use a white crayon or even a candle on white paper to draw a picture or write a message and have your child discover the hidden picture using coloured crayons or paint.
Discover more fun things to make in our Monday Makeries here
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