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

If I have the gift of prophesy, and know all mysteries and all knowledge, and if I have all faith, so as to move mountains but do not have love I am nothing. And if I give all my possessions to feed the poor, and if I surrender my body to be burned but do not have love it profits me nothing.