In the zg universe they had zombie genius schools where new budding zombie geniuses would play among each other, as the larger, guiding geniuses monitered them while devouring the creativity of the innocent living things their encountered.
"Brains?" asked one zg child to another.
The other zg child thought a bit.
"Brains!" they eventually responded.
The first child burst into a grin.
The larger zombies would raise the children in the hopes of finding better and better zombie geniuses to join with themselves.
Some non-zombie processes were strolling by the school playground. A postal worker, somebody walking their dog, another person on an errand between buildings.