🕵️ Secret Message

🔊Let's write a secret message that only grape juice can find!

⏱️ 15 minutes💲 about $2●○○Grades K–8th🧪 Goo & Fizz

• 👶 Small parts! Keep them away from little brothers and sisters.
• 🧽 A bit messy
• 🧼 Wash your hands after

Gather first

• Baking soda · 2 spoons
• A big bowl · a small one
• A spoon
• Cotton swabs · 1 or 2
• Paper · plain white
• Purple grape juice (concentrate works best) · a little, in a cup
• A paintbrush

The big idea: Some colours change when they meet a base, like baking soda.