Lego is meant to be a plaything but looks like people are attaching significance to its functions. Besides building MP3s and speakers, we actually have a safe built out of it. The Lego Mindstorms NXT Safe features a five double-digit electronic code lock, which means you can set 305 billion different combinations. Try cracking this code! The safe weighs an astounding 6.5kgs and features a direction sensitive dial; be sure to turn it in the right direction: clock or counter-clock! Catch the video after the break.