When Danish carpenter Ole Kirk Christiansen starting making interlocking wooden blocks in the early 1930s, he likely didn't imagine his toys would become a household name. That name: LEGO, from the Danish phrase leg godt, "play well," and it may be an understatement. More than 500 billion LEGO blocks have been produced since then, and 10,000 of them are headed to the Library at Hillcrest--one of 750 libraries in the United States to receive bricks from the Association for Library Service to Children. On Sunday, Dec. 21, little builders are invited for an afternoon of LEGO (and Duplo) entertainment: Library staff will read aloud while kids use the blocks to make scenes from the story they heard. It's a surefire way to "play well."