Making a volcano

JD was so excited to do this project. He read about the birth of the earth in the Usborne World History book and I had him outline it (not so excited about that). Then he made this volcano. I got the idea from our Travel with Kids Hawaii dvd.
Here's what you need:
an empty yogurt cup and plate
playdoh, twigs, grass, dirt
1/2 cup of water water with red food coloring
2 tsp baking soda
1/2 cup of vinegar

What to do:
Mold the playdoh around the yogurt cup to make a volcano leaving the top open. Decorate with twigs, grass, and dirt. Pour water into yogurt cup. Mix in baking soda and a couple drops of red food coloring. When you are ready for the eruption, add vinegar. It is instantaneous.

Just look at his face! Even the daycare children enjoyed watching this explode and asked to see it again the next day.