How do you make volcano?

Question

How do you make volcano?

Answer 1

The problem is we don't know if you are asking how to make one for a science project or how real volcanoes are formed.  You may want to edit your question to clarify that.

Answer 2

Get a drilling machine to drill into the earths crust to a magma pocket to allow the magma to flow to the surface, be sure you are willing to lose this machine to the volcano.

Also you should automate it so you won't lose your workers in the process.

Answer 3

baking soda and vinager for lava... paper mache for the actual volcano...