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!