“This project is half art, half science, and all fun! Just write a message or draw a picture in lemon juice or baking soda invisible ink, then reveal the hidden message by rubbing the paper with flowers. The color of the flower smear changes wherever you painted with the invisible ink. In fact, different flowers create different color changes, so it's the perfect experiment to try with a mixed bouquet of flowers, or with flowers from a garden.”
Ages 3-11