Disturbing?
Found: In the 70s when I was about 8 or 9 years old I had a ‘Plasticraft’ kit (almost identical to the US Plasticast toy). It comprised of a ceramic mould, enamel liquid, hardener, coloured liquids and some sample things to ‘enamel’. I didn’t attempt to make the shell pendant or the monogrammed cuff-links, I went for a stamp; creating something slightly more disturbing. Maybe it was the fumes.