Neodymium Magnets: In an upcoming physics unit for year 9 science, teachers would like to use neodymium magnets (rare earth) for a practical experiment. Are these magnets allowed to be used in schools ? I have heard confliciting stories (it appears they were banned for use in toys in Australia a few years ago) so I would just like to clarify if they can be used (and if so by which year levels) in schools.