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You can have some mud and make a volcano . place a bottle and cover it with mug and make it as mountain . pour hot water in the bottle . add few dropes of food colouring , vinegar and baking soda and move a bit back . here is  your working model .
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Take a mud and make a mountain shape and make a hole and take a Bootle and cut its mouth and keep init inside of that keep a doop stick
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