Always be very careful, because the magnets will adsorb themselves together and may pinch the fingers. Magnets are also likely to damage the magnet itself by colliding (bumping corners or bumping cracks).
Keep magnets away from easily magnetized items such as floppy disks, credit cards, computer monitors, watches, mobile phones, medical devices, etc.
Magnets should be kept away from pacemakers. Larger magnets, each piece should be added with plastic or hard paper gaskets to ensure that the magnets can be easily separated.
Magnets should be kept in a dry, constant temperature environment.