The dictionary-loving superhero "WordGirl" returns to PBS for a third season on Monday with two new episodes. Her aim is to teach your kids some useful vocabulary words. This week they learn: prolong, aggravated, extraordinary, and fortunately.

Let's use them in a sentence.

"I'm so aggravated, little Xavier, but fortunately for you, there's an extraordinary cartoon on television today, and if you watch it and leave me alone for an hour, it just may prolong your life."

Kidding. Children are our future (and that sentence is run-on so I'll leave the teaching to WordGirl).