Here’s A Shelf That Doubles as A Gun Safe. Sweet! [VIDEO]
Of all people, my wife was the one who showed this to me the other day. It's a company that designs concealment safes for your firearms for home defense. I'll be honest, some wouldn't work with a family with children, but others look pretty secure. Take a look at the video.
They also have concealement wall mirrors, clocks, and more.
They are a bit pricey ranging from 300-500 dollars, but for a gun enthusiast that really isn't that much to spend.