Erupt a model of the largest volcano in our solar system olympus mons on mars is three times taller than mt everestfirst make a model of olympus mons using plaster then experiment with some volcanic eruptions using a special plaster mixture and iron oxide powder your mega volcano hardens after each eruption and slowly grows like a real volcano modelling lava rocksthe full colour 16 page manual gives easy to follow step by step instructions as well as some fascinating facts about olymp