The Dream Catcher originated with the Ojibwa people.  According to their legend, the dream catcher was made to  collect any harm that might be in the air.  This was the reason for the spiderweb-like netting within the hoop, as spiderwebs “catch” anything that comes in contact with them.   Often they would also include certain sacred items like specific feathers or beads, to help catch anything that might cause harm.