Know thine enemy

Grandboy: Too quiet in here. I can’t eat.
Me: Quiet is good. You can hear your enemies come when it’s quiet.
Grandboy: (through muffled bites of pancake): Who’s our enemy, gwumpa?
Me: Zombies. And people who would hurt us. (Opens the blinds) But looks like no zombies today.
Grandboy: Zombies aren’t real, are they gwumpa?
Me: Nah. Just pretend.
Grandboy (looks outside): I’ll be back. It’s nice outside.
Me: Ok. Listen for things. You might even hear birds out there.
Grandboy: Birds aren’t our enemy, are they gwumpa?
Me: Nah.
Grandboy: Ok gwumpa.
Me: Unless they are zombies.
Grandboy: GWUMPA