Does elephant toothpaste work when you add dry yeast?

Yes, elephant toothpaste can work with dry yeast as a catalyst for the reaction. Dry yeast contains enzymes that break down hydrogen peroxide into water and oxygen, producing a rapid release of oxygen gas that creates the foamy eruption characteristic of elephant toothpaste. However, the reaction may not be as vigorous as when using liquid yeast or other catalysts like potassium iodide. It's important to ensure the yeast is activated properly for the best results.