Baking Soda Volcano

What you need

• Baking soda
• Vinegar
• Red and yellow food coloring
• A small plastic bottle
• A tray to catch the mess
• Dish soap (optional, for extra foam)

Why it works

Baking soda is a base and vinegar is an acid. When they mix, they react and release carbon dioxide gas — that's the bubbly fizz you see erupting out like lava! Dish soap traps that gas inside bubbles, which is what makes the eruption extra foamy.