Is what is in quotes correct?

Hi. Please help. Allow me to make up a story context. Let's say there lived a family, a man, a wife and a son. One day they sat down for dinner, and the man said to his wife and son that there would be a surprise and he would tell them what it is about ten minutes into dinner. But the son, being impatient and wanting to know right away what it was, shouted, "Please tell now!" Is what he said correct? Or should it be "Please tell me now!" or "Please tell me what it is now!"?