Look at the movies on this web site: http://volcano.und.edu/volcanoes.html
Here are Virtual Volcanoes: http://volcano.und.edu/vwdocs/kids/vrtrips.html
Here is how volcanoes and mountains are formed: http://www.pbs.org/wgbh/aso/tryit/tectonics/
Here are the main parts of a volcano: http://volcano.und.edu/vwdocs/vw_hyperexchange/parts.html
A story about Mt. St. Helens: http://volcano.und.nodak.edu/vwdocs/kids/stories/MtStHelens.html
Here are three different types of volcanoes (there are more):
Shield volcanoes are the largest volcanoes on Earth that actually look like volcanoes. They are not steep. They only explode if water somehow gets into the vent--the place where the hot magma comes out. Examples: Kilauea and Mauna Loa (and their Hawaiian friends), Fernandina (and its Galápagos friends), Karthala, Erta Ale, Tolbachik, Masaya http://volcano.und.edu/vwdocs/vwlessons/volcano_types/shield.htmMost volcanoes are Strato Volcanoes. These volcanoes are explosive and from domes--often many, one on top of another. Examples: Mt. St. Helens, Mt. Rainier, Pinatubo, Mt. Fuji, Merapi, Galeras, Cotopaxi http://volcano.und.edu/vwdocs/vwlessons/volcano_types/strato.htm
Flood Basalts cover thousands of square kilometers of thick basalt lava flows more than 50 meters thick for hundreds of miles. They just flow and flow like syrup on a pancake. Examples: Columbia River Basalt covering most of SE Washington State all the way to the Pacific Ocean; the Deccan Traps of NW India; Siberian Traps; the Ontong Java plateau.
Legends about volcanoes: http://volcano.und.nodak.edu/vwdocs/kids/legends.html