On Pottermore, that is.
In the real Chamber you have to know how to speak Parseltongue, of course.

If you need help knowing what to do, this page has tips:
A Finders Guide to Pottermore Chamber of Secrets
For a clue about the Weasley Letters at the Burrow, go here:
Tweeting.com

TIP: On my computer, I had better luck slinging the gnomes in Internet ( Read more... )