[NOTE - Michele asked where David was during this activity. He is doing a different history text this year, so he usually doesn't participate with the other kids on their history. If it strikes his fancy, he may do the activity. He's usually in the room listening to me read the MOH lesson aloud, so he does get the info. But, his Sonlight U.S. history keeps him plenty occupied!]
As part of our Mystery of History 2 studies, today we erupted volcanoes in the backyard. We were studying Pompeii and Mt. Vesuvius. The kids buried bottles containing baking soda, red food coloring, and dish soap. Then they poured in vinegar and WOW! An eruption!!!
I found a cool website to enhance our learning.
Pompeii: Unraveling Ancient Mysteries (Harcourt)
Also, just a warning - lots of extremely inappropriate pictures were painted on walls in Pompeii. If you just google image-search "Pompeii", you'll probably want to preview the results. A word to the wise!