"Volcano Song" would be a good opening activity for the volcano lesson. It highlights the important aspects of volcanoes (such as lava and magma) in a way that the students will learn from and remember.
Rincón de la vieja volcano national park Six pools with thermal waters heated naturally by the Rincón de la Vieja Volcano. The soothing mineral waters are crystal clear, all natural,fed by a river. Not to mention the freely available volcanic mud!