[Iroh can't help but smile at the boy's sudden enthusiasm.]

I'm afraid that it is not something that can be taught. You are born with Bending abilities, but birth alone does not make a skilled Bender. The art must be learned and mastered for many years.

The other elements are water, earth and air. Together with fire, they make up everything in our world. Each type of Bender has their own unique connection to their element and derive different strengths from them.