1) Dwarfism is a medical condition where an adult has a height of less than 4 feet 10 inches. It can be caused by over 200 conditions and symptoms vary between individuals.
2) Gary Coleman was a famous child actor from the TV show "Diff'rent Strokes" and is portrayed in the Broadway musical "Avenue Q".
3) The reality TV show "Little People, Big World" follows the Roloff family, most of whom have dwarfism, and portrays their lives similar to other families.