Sixty years ago, the LEGO brick was invented in Billund, Denmark. Today, LEGO is the world’s strongest and most valuable toy brand with several thousand employees. The company’s success is a lesson in self-improvement, problem solving and protecting ideas - however small. CNBC's Tom Chitty reports. ----- Subscribe to us on YouTube: http://cnb.cx/2wuoARM Subscribe to CNBC International TV on YouTube: https://cnb.cx/2NGytpz Like our Facebook page: https://www.facebook.com/cnbcinternational Follow us on Instagram: https://www.instagram.com/cnbcinternational/ Follow us on Twitter: https://twitter.com/CNBCi