What word names a spiny sea creature or a mischievous child?

A special luncheon at the 1901 Pan-American Exposition in Buffalo for which president's wife went on without her? A writer of action-packed novels for young people, who published the quiet "A Child's Garden of Verses" in 1885? A species of fire ant that reached the U.S. at which Alabama port city around 1918 has been a pest in the South? A style of volcanic eruption is named for which Caribbean volcano that erupted in 1902, killing thousands? A spirometer measures the capacity of which organs? A split in the Plantagenet family led to which series of civil wars in the 1400s? What is a spring-loaded door fastener called? A squad of guinea pigs tries to stop a diabolical billionaire from taking over the world in which 2009 film?