Secret letter 3 Brain teasers and fun science tricks

Step 1: In order to write a secret letter with the help of a candle, you don’t even need to light the candle. You’ll need: a white piece of paper and a white candle.

Step 2: Draw or write your secret message with an edge of the candle.

Step 3: The secret letter is ready!

Step 4: Now take a pencil and rub the paper with it.

Step 5: See how the paper is darkened by the pencil everywhere except where we wrote with the candle.

Step 6: Writing a secret letter turned out to be quite simple!