How do You Build a Volcano?

You can build a volcano at home for fun or for a project. You will first need to build your moutain, making sure to leave the hole at the top to mix your lava. Once made, you want to put a bottle or small glass in the hole at the top. First, you add the baking soda and even some red or orange food coloring. Next, you pour in slowly some white vinegar, then stand back and watch it errupt.