This is really bugging me...
When I was a very young child, I had been read a story about a man with a hammer. The only thing I can remember is that the sound of the man hammering was, "Bim-bam, bim-bam". Whatever the title of the book was I have long since forgotten.
The story had obviously made something of an impression on me. After visiting my grandad who had been hammering, I then spent the next few years referring to him as 'Grandad Bim-bam'.
I just wish I could remember the title of the book.