This experiment demonstrates a few principles: density, solubility, miscibility, salting out, azeotropes, emulsion. The blue beads are regular Pony Beads. The white beads are actually UV reactive pony beads. It just so happens that the plastic they're made of is the right density. Visit my blog here: http://stevemould.com/ Follow me on twitter here: http://twitter.com/moulds Buy nerdy maths things here: http://mathsgear.co.uk/