World's Smartest Kids

At 2 1/2 years old, Lilly can now identify more than 100 countries. This pint-size prodigy has also become a YouTube sensation. A video that showcases her geography skills has been viewed by almost 3 million people.

Oprah pulls out a map of the world to quiz Lilly in front of a live audience. Without missing a beat, she identifies Chad, Turkey, Sri Lanka, Zimbabwe, Norway and many more.

"Wow. You're good," Oprah says. "I mean, she can barely talk. It's not like she knows the words and knows how to spell them and can go to them on the map."