How much baking soda do you put in a baking soda volcano?

Step 1

Set the water bottle on the cardboard square and pour 1/4 cup baking soda into the bottle.

Step 2

Use the clay to create a volcano-shaped mound around the water bottle. Keep the structure on the cardboard square, and be sure to leave a hole at the top around the mouth of the water bottle.

Step 3

Add small tree structures or rivers and lakes if you want to make it look authentic.

Step 4

Add 1/4 cup vinegar to the mouth of the volcano. The baking soda and vinegar will have a chemical reaction, and the volcano will "erupt." Don't worry, it's not an explosion, just a stream of baking soda lava that will flow out of the top of the volcano.

• Brown clay
• Water bottle
• 1/4 cup baking soda
• 1/4 cup vinegar
• Red food coloring
• Cardboard square (10 by 10 inches)