The Consumer Electronics Show is currently taking place in Las vegas. The CES is where tech companies - large and small - showcase their newest products. A surprise entry this year is Lego. The Danish toymaker unveiled an interactive building brick, describing it as one of the most important developments in the Lego system for decades. The so-called Smart Brick is equipped with a speaker, LED lights and a tiny chip that allows it to detect and interact with other Smart Bricks. And US tech giant