6 Wheels and Flies

Question: What has 6 wheels and flies?

Question: What is that thing we buy for eating but cannot eat it?

Question: You build a house and all 4 walls are facing south. Where did you build the house?

Question: What sound does a nut make when it sneezes?

Question: Look at my face, I am somebody. look at my back, i am nobody. What am I?

Question: I have 6 faces and 21 eyes, but can't see a thing. What am I?