These are dvds that teach magic with PK rings(PK ring = magnetic ring):
Wizard PK ring dvd(recommanded)
Vortex Pro PK ring dvd(recommanded)
Randi Rain - PK ring effects(most effects are bad and I really dont like her style but you decide for yourself)
I recommend watching Alan Rorrison on Penn & Teller:Fool us.He has a great Matrix routine using 2 PK rings. I would also recommend checking out G´s Corner Project which,besides all the other amazing tricks,has a beautiful coin production using a PK ring.
Finally,be creative and create your own effects.
(I´m sorry if I annoyed you with this statement,I know you heard it a million times

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