Good Riddles

Question: When I left, I didn't know where I was going; when I got there, I didn't know where I was; when I returned, I didn't know where I had been. Who was I?

Question: What did the banana say to the elephant?

Question: What is as big as an elephant but weighs nothing?

Question: What kind of bed does a mermaid sleep in?

Question: What do you call a retired vegetable?