The best children's book ever?

I cant remember the title. I'd love to know it too!! I think it was a Dr. Seuss book and in it, the kid gets himself a fish and overfeeds it. The fish keeps growing and the kid puts it in a bathtub, but eventually the fish has to be moved to an aquarium. I loved that book!!! The second I find out the title I'm going to order it through Amazon!!!

The Wizard of OZ   (not for me, but for my sons) 

not for me because as a child, I had no books other than the Bible and the Sears Roebuck catalogue.  My grandparents and parents told us stories such as Little Red Riding Hood and Little Black Sambo, Goldilocks and so forth.And many they made up from their own imaginations.  The only book I remember reading and re-reading as a young person was The American by Howard Fast.  I was 16.

The reason I said "not for me" was because as a child I had no books.  We had the Bible and the Sears, Roebuck catalogue.  Our parents and grandparents told us stories such as Little Red Riding Hood, Goldilocks, Little Black Sambo and so forth.  The only book I remember reading and re-reading as a young person was: The American by Howard Fast.  I was 16 and found it at the library.