The term 'Brand of Toy Blocks' can be answered with the four letter word LEGO. LEGO is a Danish toy production company that was founded in 1932 and is now one of the world's largest manufacturers of toys. LEGO is best known for its interlocking plastic bricks, which are used to create various structures and models. The company also produces a variety of other products such as action figures, board games, and video games.