Though at face value it is a simple plastic brick, in less than a century LEGO has taken the world by storm and risen to the top of the toy wish list - here's how they did it and why they're so popular.

Have you got what it takes to take on the ultimate colour psychology quiz? Match the correct trait with the associated colour and see how you fair against friends, family and colour fanatics alike!

With an estimated 18 decillion varieties of colour in our world, you would think it would be impossible to pick which one is best... but, we're going to give it our best shot by dissecting some of the options.