I use hard drive magnets from computers I've scrapped. They're pretty strong.
You probably have to use a rare earth magnet.
Put your ASE, 90% or 40% it a plastic coin flip, make sure there are no staples.
Tape a piece of thread to the flip so you can suspend the coin from the thread.
Run you magnet by the coin and watch it move. This is new to me.
You could really freak someone out with this