My favorite children's book is "Green Eggs and Ham" by Dr. Seuss. Have you read it?
No I haven't read it. Dr. Seuss should be a very famous writer. I heard that his work has been translated to 20 languages/
That is very impressive. His books have definitely withstood the test of time!
Dr. Seuss also supported Theodor Geissel when he wrote the cat in the aht. It is also a very famous children book. 
Yes I believe that is his real name. Dr. Seuss was his pen name for his children's books.
My friend also wrote a book the hearth in the cloud with a pen name he even signed our book with his pen name 
Cool, I think pen names are a great idea. It lets you adopt a persona for your work of fiction.
I sometimes don't understand why you need to use a pen name instead of your real name but it sounds so much fun.