Roald Dahl's Matilda

I hope most of you have already read the book. As the date of the the English competition is fast approaching (28th of November), I have a question for all of you who are going to take part at the competition:

What part of the book do you like best and why?

Explain in a few sentences.

And here are some links that might be useful or interesting:

Roald Dahl Quentin Blake