Magnets attract any thing that contains iron and nickel.If you put the identical poles of two magnets together, they will repel. If you put the opposit poles together, they will attract each other and connect.

Magnetic field means the area around the magnets. For example, if you get magnet's and you move them around the sand, then you will see these little magnets and you try to take it out in a basketball it won't get off because they are attracted to each other.

Magnets & Magnetism