The term 'Building Brick Toy' refers to the popular toy brand LEGO. LEGO is a Danish company that produces interlocking plastic bricks that can be used to construct models of various shapes and sizes. The bricks are designed to fit together in a variety of ways, allowing children to create their own designs and play with them. LEGO has become one of the most successful toy brands in the world, with its products being sold in over 140 countries.