Most of you have probably done this in science class at one point. It's loads of fun for the kids and would go GREAT with a Harry Potter or wizard party.

Note: As in all recipes, results can vary depending on humidity, conditions, etc. Please try any recipe out before attempting in a group setting.

This project is rated EASY to do.

What you need:
• Cauldron
• Water
• Baking soda
• Vinegar
• Tablespoon
• Cup
• Pan or tray

How to make it:
1. Create the cauldron.
2. Place the cauldron on a pan or tray (or you'll get potion all over the place!).
3. Fill the cauldron with 2 tablespoons of water and stir in a tablespoon of baking soda until it dissolves.
4. Measure 2 tablespoons of vinegar into a separate cup.
5. Pour the vinegar, all at once, into the water/baking soda mixture and watch your potion bubble up!

WHY'D THAT HAPPEN??
The bubbles that are created are filled with carbon dioxide. The carbon dioxide is a gas that forms when the vinegar (an acid) reacts with the baking soda (a base). For all you bakers out there, this is also what makes cakes and quick breads (the no yeast kind) get all nice and fluffy.

Tips: 
For those of you who don't allow Halloween, potions, witches or brews, this craft recipe is still a really NEAT science experiment!

Source: KidsDomain.com