Everything you can write on...

Lodz' people (and probably Poles in general?) like to write and draw on everything you can possibly write on.
They seems to have not any prejudice against any material, surface or place... It's an surprising attitude that I actually like. A kind of freedom.

See here a simple example demonstrating having not any restriction.

Just making something clear!

But in Baluty - surprise! - it gets a special implementation.