answer:The standard volcano building method involves an 18×18 wood base, a paper towel tube, newspaper, masking tape, papier mache paste, and tempra paint. Maybe some small rocks, glue and spray varnish. To make the volcano explode, you put baking soda in the paper towel tube, a little red food coloring, and then you add white distilled vinegar, and it overflows. A good “HELP! My Father Hijacked My Homework!” version would be a 4×4 piece of plywood, chicken wire, PVC piping, plastic sheeting, spray expandable insulation foam, spray paint, rocks, dry ice, vinegar, baking soda, food coloring. The version of this baby that appeared at science fair stood 4 feet tall. There was a main eruption chamber that got the vinegar and baking soda. There was side vents coming out of the mountain that had dry ice, and looked like steam escaping. The mountain was shaped out of chicken wire, covered in plastic sheeting and then sprayed with the expandable foam to look like a mountain. The thing was spray painted, rocks added. If I recall correctly there was trees on the mountain, and a model farm at the base. It was eviable. Thought process would be durability, making it light enough to be transportable, and repurposing materials at hand. The guy that built this was an engineer and a model train buff.