Magazines for Kids
Science and Technology
I grew up reading Popular Science and Popular Mechanics magazines. They are great sources of non-fiction writing for kids. Make Magazine gets my kids talking.
Muse is a kids-focused magazine covering art, science, math and general interest. I prefer this magazine over alternative kid-focused ones because it does not undermine itself by writing "for kids" on the cover.
These are sophisticated magazines dealing with American and world history. Maybe they are more for me than my kids.