Bored kids are the worst.
Kids hate being bored so much it makes them blind. Blind to the hundreds of toys staring them in the face, blind to the dozens of books within arms reach, blind to the open space and fresh air in the backyard.
They hate it so much it makes them deaf, too. Deaf to their parents reminders of all those toys and books. Deaf to their parents’ threats that if they don’t stop complaining about being bored, all those toys and books will be given to someone who will actually use them!
About the only thing it doesn’t make them is mute, because bored kids literally never stop telling you about it.