A couple of scripts I've created that allow you to create a LEGO style bricks in a variety of shapes and sizes.

 

Brick Generator allows users to create realistic LEGO style building bricks of various sizes. Choose from Brick or Plate types as well as the choice to add the LEGO Logo to the studs of your bricks.

 

Build A Brick allows users to create realistic custom shaped LEGO style building bricks. Choose from Brick or Plate types as well as the choice to add the LEGO Logo to the studs of your bricks.

The script can be found here:
creativecrash.com/maya/script/brick-generator