This is a VERY simplified volcano model. We could have jazzed it up, and actually BUILT a volcano of clay around the jar, but we've had a busy week and didn't get to that but I still wanted to do the 'hands on' part of the unit.
*I wanted to add: Two was very unsure of herself, and didn't like that I was video taping her. But, in the end, decided I could use it here anyway.*