Simplify the following text for a Grade 7 native English-speaking person.
Original: This includes the smaller islands that surround the main islands , but are still part of the main island country ( for instance , the Republic of Cuba consists of the island of Cuba , the Isle of Youth , and several smaller islands around them . )
Simplified: This includes the smaller islands thst surrounding the main islands , but are still part of the main island country ( eg . the Republic of Cuba consists of the island of Cuba and several smaller islands around it ) .