How to Make a Clay Volcano
Did you know that there are around 1,510 active volcanoes in the world, and we currently know that more than 80 of these are under the sea! Volcanoes act like pressure valves, when too much pressure builds below the Earth’s crust it is released in the form of magma and lava.
Why not have a go at replicating your own mini volcanic eruption with this clay volcano, which uses a chemical reaction between bicarbonate of soda and white vinegar to produce foam, you could even add a few drops of food colouring to give the foam a splash of colour.
Project with thanks to Suzie Attaway
1. Take a chunk of air drying clay and roll it out on a large square cake board. Continue until the cakeboard is completely covered with a 0.5 centimetre layer of flat clay.
2. Place the small jam jar in the middle and twist into the clay. Roll sausage-shape pieces of clay with your hands and start building up layers of clay around the jam jar. Carry on adding more clay until you have formed a mound around the jar, then add some thin strips of ‘lava’ from the top to the base. Make small marks with your fingertips all over the surface of the clay, then leave to dry for 3 to 4 days.
3. Start painting the top of the dry clay volcano with light orange paint. Work your way down with dark orange, then red, then burgundy, and finally black around the bottom of the volcano. Add splats of orange paint all over the volcano, then leave to dry.
4. To make the volcano erupt, first add the water, bicarbonate of soda and food colouring into the jar and mix. Then pour in the vinegar and watch the volcano bubble and fizz.