Kids adore playing spies! And what is more fun than the invisible ink as a supply for spies? Make your own invisible ink and play with your family and friends.
You will need:
Lemon juice
A small glass
Toothpicks
Paper
Iron
Put the lemon juice in the glass, soften the point of your toothpick in the juice then write your message with juice. To make your message appear on the paper, let an adult help you by ironing the paper; the message will appear in brown!