The Lego Group world's largest toy company by revenue, with sales amounting to US$2.1 billion, surpassing Mattel, which had US$1.9 billion in sales. On 11 August 2017, Lego announced that Niels B. Christiansen would become the new CEO, effective 1 October of the same year. The history of Lego spans nearly 100 years, beginning with the creation of small wooden playthings during the early 20th century. Manufacturing of plastic Lego bricks began in Denmark in 1947, but since has grown to include factories throughout the world. In 1961, Lego was managed by Samsonite until 1972 in the United States and 1986 in Canada.
Construction set — building an object out of Lego, for example. The effect was found in high school students. For children specifically, children who complete models using toy building blocks have much better spatial ability than children who do not complete such models. Spatial ability also predicts completion of models. Construction toy play is also beneficial for autistic children when both individual and group play with building blocks is incorporated. Autistic children who played with building blocks were motivated to initiate social contact with children their age, they were able to maintain and endure contact with those children, and autistic children were