clay
vinegar
baking soda
some kind of tray or brownie pan
safety glasses
1. Form clay into a volcano form.
2. Let it dry for 3 to 2 days.
3. Pour 1/2 centimeters of baking soda into the volcano.
4. Put on safety glasses and pour alittle vinegar.
5. Watch it erupt.
From Hannah, age 11, USA
More posts like this one in Volcano Models.