
I'm pretty sure I remember learning about it on Blue Peter or possibly How 2, which means it might be even longer than that.
( ,
Tue 13 Jan 2009, 19:01,
archived)

just thought it might be news to folks as getting magnets involved with your (not) copper is not that common in this age of magnet unfriendly pocket toys.
( ,
Tue 13 Jan 2009, 19:32,
archived)