These dreams, while believed to be revealing in nature, could be affected by the energy in the area that was slept in. The Ojibwe, (sometimes spelled Ojibwa) nation created what are now known as "dream catchers".This tribe is also known as the Chippewa. These hoops entwined with thin rope or netting into a web or "snare", were thought to change the very energy of a room by trapping everything negative within the weaving. Use and meaning of Native American symbols vary according to different nations, tribes and regions.