Children are stupid. Be smart, and secure each room for a stupid person

Eh. Semantics. Ignorant implies they actively ignore information that is relevant to a given situation. Stupid better describes the situation here. They didn’t think things through. They don’t have the knowledge required to understand. It’s fine. We forgive them for being stupid. But they’re stupid. With time, maybe they won’t be so stupid. Although the boy here, having had a dresser fall on his head, might have some more difficulty than others.