![Invisible lemon ink](https://sdcdm.org/wp-content/uploads/2024/08/invisible-lemon-ink.jpg)
STREAM Activity: Invisible Lemon Ink
Activity best for children ages 4 and up
Invisible ink isn’t just for spies—you can write your own secret message right in your kitchen! Check out this cool way to learn about chemical reactions, using ingredients from your own home. Why does this work? Lemon juice is an acid and weakens the paper. The salt and crayons are a base. When these two chemicals mix together they react and the base helps you see the acidic message!