Invisible Ink

What you will need:

1. lemon juice

2.cotton swab

3.paper

4.small candle

5.matches

What you do:

Soak up lemon juice with cotton swab, squeeze out the extra juice, but leave it damp. Write your message. Then hold the paper above the candle at a safe distance. Trace the letters with the candle. Then soon your message will mysteriously appear!

Like this below