Why does a transformer only work for AC supply and not DC supply?

A transformer makes and collapses a magnetic Field inside 60 times a second for home power in North America, 50 times a second in Europe.

The building and collapsing of a magnetic field "Induces" a voltage in another transformer winding.

DC current only creates a stable magnetic field and this will not create or induce voltage in the other winding.

Normally covered in grade 5 science where I live.