The safety concerns

As with everything, there are certain risks that people need to be aware of when working with these magnets.  First of all size is an important part of this question.  A small magnet such as a disc that is ¼ inch (6.35 mm) in diameter x 0.125 inches (3.125 mm) thick is pretty harmless around your fingers. They will snap together easily but are not large enough to have fragments break off and fly around.