Sign up here for a free subscription to Lego Magazine. My boys absolutely love this. They also love the fact that they get mail (that's a cool bonus).
It says it's a 2 year free subscription, but I'm pretty sure that I signed up my boys like 4 or 5 years ago and they are still getting it. But it wouldn't matter, after 2 years you could sign up again.
I am now signing up Anthony and Rance because they love looking at Lee and Champ's magazines.