It can pull through paper, plastic, glass, or water to name a few. this again shows how a magnet canuse its super hero-like pulling ability without actually touching the object. when our superhero magnetattracts things made out of iron, it shares some of itsmagnetic powers with those object
If we're talking about minute organisms such as microorganisms, then the tool that would be used is supposed to be a microscope. If we're just talking about small organisms that can still be seen using the naked eye, a magnifier or glass lens will be enough.