Use a magnet to separate the iron fillings from everything else. Then use a filter with small holes so that the sand can get through but not the salt and pepper.
Use a magnet to separate the iron fillings from everything else. Then use a filter with small holes so that the sand can get through but not the salt and pepper.
Use a magnet to separate the iron fillings from everything else. Then use a filter with small holes so that the sand can get through but not the salt and pepper.