(Volcanoes happened over several days, and apart from the fire one happened lots of times.)
We started with a balloon blown up with air.
Sure enough the lava chamber expanded and whoosh lava flowed everywhere.
We even ended up with a small crater lake after the hose finished fountaining lava about.
Then since the wind was calm, it wasn't to wet, or to dry, David finally decided to try a volcano he'd first seen demonstarted at a Kindergarten 15 years ago.
We got smoke. (Leading to a talk on staying low and getting out quick if there's smoke.)
Finally Adrianne who'd been standing by with the hose put it out.