Ever wondered how spies and secret agents make secret messages?
WARNING: It is really quick and easy to make secret messages, however in order to make secret ink work you need fire, so this toy requires adult supervision.
_Half a lime
_A thin brush
_A piece of paper
How to make secret messages:
1. Dip the tip of your brush into the lime. You can also squeeze the juice out of the lime into a container and dip the brush into the container.
2. Write your message onto a blank piece of paper. You’ll need to get more invisible ink (lime juice) every letter or two.
3. Let the lime dry for a few seconds. Your piece of paper will look as if it had nothing on it.
4. To reveal the message, get an adult to pass the flame of a lighter gently under the paper, all the way through your secret message.
Think twice next time you find a blank piece of paper!