I've been reviewing with Jaś what he remembers about how the Earth is built and what he knows about volcanoes.
First we read this book:
Next we made play-dough:
Jaś wanted his volcano to be green-brown-yellowish color, that's why we added some food coloring to the play-dough:
Jaś formed his volcano on a plastic bottle:
We added a couple of spoons of soda to the bottle:
And poured vinegar into it. And voila ... lava started pouring out of the volcano!
Jaś also worked with Montessori 3-part-cards of Earth layers:
And parts of a volcano: