Make a 9.5cm tall solid volcano with the mould and plaster provided in the kit. Paint and decorate it. Put baking soda and vinegar into the 'crater' and amaze your family and friends with a bubbly, fizzy lava eruption. It's an awesome science project and a cool desktop decoration. Includes 1 bag of baking soda sufficient for 1 or 2 eruptions. Vinegar not included. Ages 8+.