The wooden stool
The wooden stool symbolizes Martin's simplicity and humbleness. When Martin enters the church, he heads straight to the middle to sit on a wooden chair. Other children in the church recline on sofas and luxurious chairs. Consequently, Martin believes that we are all equal before God, and one must be humble whenever in the place of worship.
The mountain
The mountain symbolizes reality. When Martin’s father fails to return home, he gets worried and goes to the mountain to confirm if he will see him coming. However, when Martin arrives at the mountaintop, he realizes that everyone has vanished. The reality hits Martin hard when he discovers he is alone with no relatives or friends.
The mysterious machine
The mysterious machine constructed by Martin's father symbolizes Martin's new possibilities. After adults vanish from the face of the island, Martin continues to build his father's machine but modifies its structure with the hope that it will set things right. The children who help Martin reconstruct his father's machine tell him it will take them places to discover new possibilities. One of the children suggests to Martin that they should redesign the mysterious machine to look like the Lord of the Flies to help them uncover the mysterious secrets of their society.
