Dream catchers come in many different forms. Usually they look like the picture below and are said to catch bad dreams and keep bad spirits away.
However now there is a new style dream catcher, which isn’t a netted ring with beads and feathers but jars.
They are said to work the same way, similar to the legend of Pandora’s box it is said that you should not open the jar as you let out all the bad dreams. The best place to buy them from is specialist dream catcher jar websites which you can google to find. However these can be expensive so it is best you search on Amazon or Ebay.