Become a secret agent! 🕵️‍♀️ Learn the classic trick of creating and revealing Invisible Ink using two simple household items! Write secret notes to friends and use heat to make your hidden message magically appear. Pure fun and simple acid/base chemistry! 🛒 Ingredients & Supplies: Lemon Juice (the ink) OR Baking Soda Solution Small Bowl Cotton Swab or Fine Paintbrush Plain White Paper Heat Source (hair dryer, iron, or light bulb—use caution!) 🛠️ Instructions (Keep your secret hidden!): Write