Another Logo fan here. I still haven't found any other environment that makes me wonder about the power of computers as Logo did. I was 7 to 10 years.

http://en.wikipedia.org/wiki/Logo_%28programming_language%29 Logo also worked for me as well, I was in the 3rd grade when I started to program with it. It is a lot of fun

Definitely. Learned Logo when I was 7 years old and it gave me all the fundamentals I needed.