Attach a paper cup with scotch tape to a large paper plate right side up. Leave a hole at the top before you cover the rest of the cup and plate with aluminum foil. Secure it with tape. Place your volcano in a pan or tray. Poor 1 tbsp. of baking soda into 2 tbsp. of water until it dissolves in your volcano. Poor 2 tbsp. of vinegar into the volcano and watch what happens.
Put a paper cup, right side up, onto a tray and cover both of them with tin foil. Make sure to leave the top of the cup open to poor in your lava mixture. Fold the remaining tin foil over the rim of the cup, so you can make a mountain shape. Roll out play dough and cover the foil of your mountain. To make your volcano erupt, pour 3 tbsp. of baking soda into the cup. Pour in ½ cup of white vinegar mixed with red food coloring in the volcano cup to make your volcano erupt.
Place an open 20 ounce bottle in the middle of a baking pan. Mix a bit of water with 6 cups of dirt around the bottle to form a mountain. Pour 1 tbsp. of baking soda into the bottle, and then pour in a mixture of red food coloring and 1 cup of vinegar. Another kind of volcano can be made by molding play dough around a baby bottle to make a mountain. Pour warm water in the bottle until it is half full. Add two drops of red food coloring, six drops of detergent and 2 tbsp. of baking soda into the water. Add vinegar.
Mold clay into a volcano shape on a piece of cardboard. Leave a hole at the top of the volcano. Place a paper towel roll into the center of the volcano, making sure it is the same height as the top of the hole. Let the clay dry. Paint the volcano so it resembles a real one. Pour baking soda into the paper towel roll and then add some vinegar.
While outside, form a volcano in the dirt or sand. Leave a hole at the top of your volcano. Add two tablespoons of baking soda. Mix red food coloring in ½ cup of vinegar. Pour vinegar, food coloring mix into the volcano.