Needed:
2 Tbs. pure lemon juice
Cotton swab
Directions:
Pour lemon juice into a small glass or plastic dish. Soak one end of the cotton swab to write a secret message or draw a picture on a sheet of paper. When you are ready to view your secret message have an adult hold the sheet of paper near a light bulb. The heat will slowly turn the lemon juice dark brown and reveal a hidden message.
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