The six horrible Herdman children create mayhem during Halloween. Annotation. The Herdmans plus Halloween have always spelled disaster. Every year these six kids -- the worst in the history of Woodrow Wilson School, and possibly even the world -- wreak havoc on the whole town. They steal candy, spray-paint kids, and take anything that's not nailed down. Now the mayor has had it. He's decided to cancel Halloween. There won't be any Herdmans to contend...

Dora's mother is having twins, and Dora can't wait to be their big sister.

On their way to a May Day parade, twins Hue and Hoa spy a confused-looking duck and try to help it reach the pond, while neighbors from many countries offer help and greetings in different languages.