New vocabulary

Do you know what is "Cumulonimbus"? Look it up if you don't, or you can call Jathan, and he will tell you all about it.

Few days ago, he was trying to tell me something about "Cumulonimbus", so I said to him: "Where did you learn this word?"
"From daddy's cloud book and Russell know about "cumulonimbus" too!" He said.
"Who is Russell?" I asked, Jathan sighed and said: "Russell is from the movie "UP", and the bird named kevin and the dog's name Doug."

I am always amazed how much my son knows and remembers, it would be nice if I can learn english as fast as he can.