One of the children has eaten the last and most precious popsicle. Larry is furious. He was going to eat it when no one was looking.

He interviewed his children:

Dave: "Daniel ate the popsicle." Daniel: "Liz ate the popsicle." Derrick: "I didn't eat it. I don't even like orange." Liz: "Daniel is a big fat liar!"

Only one of the children is telling the truth and the others are, can you believe it, lying. Which of these children is telling the truth?