This video shows how the Volcano model itself was built. It took a few working hours, so 2 or 3 afternoons needed to make this model.
There is no fire or any eruption in Part 1.
If you want to know how to make the fire and see the tests, please go to Part 2.
If you want to see the eruption during the successful presentation on the school playground in front of the two year 4 classes, go to Part 3.