Lego was Founded in 1932 by carpenter Ole Kirk Christiansen from Billund, Denmark. At first he didn't produce our belowed bricks but made wooden toys. The company began making the interlocking bricks that we know and love no sooner than in 1949. But that was not it. The final design of the brick emerged in 1958, and it took them another 5 years to find the proper materials, that would be suited for production of the bricks.
So, again, happy birthday, LEGO!