Hello 2nd query of the day. We would like to have a 'pottery design' interactive in the new pre-history gallery and prefer a physical/sensory one rather than using IT. I know that you can get mattresses with memories but does anyone know of a similar material for this interactive. We want visitors to use a range of natural materials (shells, twigs, rope, bones etc) to imprint onto a surface that mimics clay but we need it then to reform back into a smooth surface - a bit like an etch-a-sketch. Look forward to many interesting replies. If not, perhaps I could invent it myself and make a fortune! Gillian Mason Exhibition Interpretation Co-ordinator Great North Museum Project