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There are several robotics competitions which use the Lego robotics sets. The earliest, and likely the largest, is Botball, a national U.S. middle- and high-school competition stemming from the MIT 6.270 Lego robotics tournament. A related competition is FIRST Lego League for elementary and middle schools. The international RoboCup Junior football competition involves extensive use of Lego Mindstorms equipment which is often pushed to its extreme limits.
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The Lego Group has used the Lego toy system to branch out into a number of other areas.