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How fitting, as apparently tomorrow is Roald Dahl Day. 

I'm not sure Dahl's site counts, since it isn't really his site.  He's dead, after all.  Also, for the most part, the site is just a bunch of silliness. 

SUCH GLORIOUS SILLINESS.

I always was a sucker for a good sound effect...

Anyhow.  I think Dahl's site is excellent, primarily because it is so ridiculous.  Since he's known for his very imaginative children's literature, it's fitting that his site is fun and a little insane.  Also, there's a bouncing, farting chicken. 

I must admit, I wish there a more "serious" section of his site for those of us who want to read about him and his work without distraction.  There is a section dedicated to his biography, which briefly touches on the stories he wrote for an adult audience (please read some of those).  However, the farting chicken interrupts occasionally.