[click pic to enlarge!]
Space Kid Island can be broken down into three main components: the outer rim, the central hub [where the bridge is located], and the six wings connecting those two. Shown here is the deck level of the rim, containing the larger common rooms, airlocks, and lifeboats.
Above decks are utilities, shielding, equipment for detection and communications, and retractable defense weaponry. Below decks also has all those same features plus gravity generators and hydroponics.