Never leave the room
Every parent knows that the scariest sound in the world is silence coming from the room you’ve left your children playing in. Raucous laughter and annoyed wails are fine, you can handle those. The true horror comes from knowing that, in the silence, something you own is getting ruined.
This particular parent feels our pain. Thinking nothing of leaving 2 children in the sitting room with what looks like baby powder (rookie mistake, if you ask me!), this is what they returned to. I would be desperate for schools to start again too.