Can you write a poem about it?

Sure, here's a short poem about a magnetic field:

A force unseen, yet strong and true
It guides and pulls, and makes things move
From iron filings to compass needles
The magnetic field is full of possibilities

It surrounds us, in earth and space
A fundamental force with a hidden face
But with the right tools and a curious mind
We can unlock its secrets, and learn to find

The power of magnetism, it cannot be denied
It shapes our world, and serves as a guide
From motors to generators, it provides the spark
The magnetic field, a force to marvel and embark.