Today we made a model volcano at the Out of School club in Shrewsbury. We made a mound of damp sand, pressed a hole in the centre and placed a cupcake case inside it. We half filled the case with Bicarbonate of Soda. Then we mixed 300ml of vinegar with a few drops of washing up liquid and some red food dye. Then we poured the mix onto the Bicarbonate of Soda and watched the fun.