Simplify the following text for a Grade 12 native English-speaking person.
Original: The Federation of Saint Kitts and Nevis ( ; also known as the Federation of Saint Christopher and Nevis ) , located in the Leeward Islands , is a federal two-island nation in the West Indies .
Simplified: The Federation of Saint Kitts and Nevis ( , also known as the Federation of Saint Christopher and Nevis ) , is a federal nation made up of two small islands in the Caribbean Sea .