FIRST LEGO League is an international competition organized by FIRST for elementary and middle school students. Each year in August, FIRST LEGO League introduces a scientific and real-world challenge for teams to focus and research on. 

http://www.hightechkids.org

For Inspiration and Recognition of Science and Technology is an international youth organization that operates the FIRST Robotics Competition, FIRST LEGO League, FIRST LEGO League Jr., and FIRST Tech Challenge competitions

https://www.firstinspires.org/robotics/frc