Good Riddles

Question: Why did the sun go to school?

Question: What are the strongest creatures in the ocean?

Question: Why are pianos hard to open?

Question: What do you call a gorilla with a banana in each ear?

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?