🧪 Bubbling Witch's Cauldron

🔊Let's brew a green potion that bubbles right out of the cauldron!

⏱️ 15 minutes💲 about $2●○○Grades K–8th🎃 Haunted Workshop

• 🚫 Not food! Never taste it, and wash your hands when you're done.
• 🥽 Goggles on
• 🧽 A bit messy

Gather first

• A plastic cauldron or a dark bowl · 1 (or a dark bowl)
• A baking tray or big plate · to catch the spills
• Baking soda · 3 tablespoons
• White vinegar · 1/2 cup
• Dish soap · a squirt
• Food colouring · green, a few drops
• A spoon
• A measuring cup

The big idea: An acid and a base make a gas, and soap turns the gas into a foaming potion.