[arockwell]

You must be at least 13 https://www.facebook.com/help/?faq=210644045634222

Because of: http://en.wikipedia.org/wiki/Children%27s_Online_Privacy_Pro...

[drcube]

What that actually means is that you have to claim a birth date of over 13 years ago. There are certainly plenty of children younger than that on Facebook.

[arockwell]

Yes, this is absolutely true. I should have worded my post more clearly to indicate that this is the policy not the reality.