Get a bar magnet. Hold it up, wave it around..
Feel anything? Rigght.
The magnetic field moving around is no big deal. It's a weak force.
We may need to recalibrate our compass some day.
Birds migrate via the stars positions, the sun's ultraviolet light, etc. There's no doom here, sorry.


You need to do a lot more research. Magnetic force is something like 54 Xs that of gravitational force. You think gravity isn't a big deal either?



Let him pick up a strong enough magnet n see if the iron doesn't get sucked out of his blood