How many children live on the island of alcatraz not including moose and natlie in the book al Capone does your shirts?

In "Al Capone Does My Shirts," there are a total of 37 children living on Alcatraz Island, excluding Moose and Natalie. These children are the offspring of the prison staff and live on the island during the time the story is set. The unique environment of Alcatraz provides a distinct backdrop for their experiences and interactions.