Supplies:
small container - I used a baby food jar
something to make the outside of the volcano. I used play dough, but you could make one out of paper mache, or make a dough from flour, water,and oil.
vinegar
baking soda
dish soap
food coloring
Instructions:
Make the volcano by building the dough around the container. Pour in some vinegar, a squirt of dish soap, and the food coloring. Take this outside or put it on a cookie sheet so it doesn't make a huge mess. Let your child pour the baking soda in and see the chemical reaction. Kids love this!