In a small bowl, cover tapioca with a cup of water and let soak for about 4 hours
Peel each orange and remove tough white membrane holding slices together
Break orange flesh into small pieces
In a large saucepan, combine 4 cups of water with the sugar
Bring to a boil and stir until sugar dissolves
Drain the tapioca and slowly pour it into the pan, stirring constantly
Cook over medium heat for about 3 minutes until the pudding thickens
Add the orange, mix well and bring to a boil