In 1958, Christiansen's son invented the small plastic bricks which could click together. Since then the different types of LEGO building materials have expanded to include larger sized bricks called DUPLO for smaller children to build with. Recent additions to the range include Star Wars LEGO, and the BIONICLE range of action figures.

There are even LEGOLAND theme parks in Denmark, Britain, the USA and Germany where families can enjoy rides, build with life-size LEGO bricks or walk through miniature LEGO cities.

From the simple idea of a small plastic brick, LEGO has grown into one of the world’s most popular toys being named "Toy of the Century" in the year 2000.