During our winter camp we also made some volcanoes!
The volcano in the first picture wasn't made but bought from the popular Chinese website 'taobao' for a few RMB.
To make the volcano base we mixed 2 cups of flour, 1 cup of salt, 1 cup of water and a spoonful of cooking oil.
We just mixed it until it began to get thick.
We then put a small plastic cup in the center of the base filled the cup half way with sodium and a drop of red ink and then when you pour in half a cup of vinegar it erupts like a volcano!
The winter camp has been really fun and the kids seem to be loving it! =]