Marble (toy) Required" and "The Colbert Report". Currently, the world's largest manufacturer of playing marbles is Vacor de Mexico. The company makes 90 percent of the world’s marbles. Over 12 million are produced daily. Marbles are also made in China and may contain lead, arsenic, and/or cadmium due to the manufacturing process of old glass. Art marbles are high-quality collectible marbles arising out of the art glass movement. They are sometimes referred to as contemporary glass marbles to differentiate them from collectible antique marbles, and are spherical works of art glass. Collectible contemporary marbles are made mostly in the United States by
What Are Little Girls Made Of? Handlen of "The A.V. Club" gave the episode a 'B+' rating, noting that the "repetitive plotting" took away any real sense of threat and that without Spock or McCoy to play off, Kirk's character is less interesting. What Are Little Girls Made Of? "What Are Little Girls Made Of?" is the seventh episode of the of the American science fiction television series, "". Written by Robert Bloch and directed by James Goldstone, it first aired on October 20, 1966. The first episode of the series to be repeated on NBC, the title of the episode is taken from the fourth