Lego's CEO told CNBC: "I think we can continue this low double-digit growth for the foreseeable future." 

Five years ago, when Knudstorp fist joined the firm, it was losing around $350 million a year. Knudstorp has since restructured the company, closed down plants and minimised packaging.

While many firms are outsourcing production to more cost-effective countries like China, Lego decided to take its operations back to the US.

Knudstorp explained: "The real economic profits are much less (when you outcome) because you lose sales, you have too much inventory, you've got too much working capital.

"So we found that for a number of reasons (it's) economically unattractive to manufacture in China to serve our major markets. China to us today is 40 times smaller than the US market. I think it's going to be another 15 to 20 years before China is a major market in the context of Lego."

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The CEO also said he may be manufacturing in Asia in ten years, but in the near future, it plans to increase capacity in Mexico.