Technology

Facebook's mad men

 Pablo Delcan/The New York Times

With its access to two billion users, Facebook’s advertising algorithm can make or break companies. It can even drive you crazy – as the founders of one successful start-up discovered.

Learning to write code for a robotic Lego cat

The app walks you through a few pre-set robot designs, but you can make and code whatever you like.

Blending the familiar fun of plastic, colourful bricks with a surprisingly complicated robot-building kit and code-writing primer, Lego Boost is part educational tool and part amazingly geeky high-tech toy.