What is a playing card with two spots called?

A plaque left on the Moon in July 1969 has the signatures of Neil Armstrong, Buzz Aldrin and which two other men? What is a plaster cast made of a living person's face called? A platypus was one of the mascots of the 2000 Summer Olympics in which city? What is a play area for very young children, and also a franchised children's TV show begun in 1953? Which playwright wrote the line "We are all born mad. Some remain so"? A plaza in San Francisco is named for which politician, a city supervisor when he was slain in 1978? What word names the plectrum of a harpsichord and a porcupine's spine? A plow appears on the seal of which Cabinet department created in 1862?