The dream catcher is an emblematic Native American object. In Native tradition, the dream catcher is hung on the bedroom window and has the power to catch all dreams. 
The bad dreams are held in the net until dawn and are burnt by the first sunbeams. The good dreams find their way to the center of the net and are driven down. 
Hold in the feathers, and they will come back during another night.They aimed to protect sleepers, especially children, from bad dreams, nightmares, and evil spirits. Native Americans believed that at night, the air was filled with dreams, both good and bad. 
They would hang the dream catcher over their beds. They had to be careful that daylight could reach it.