A small polypropylene boomerang with a short range (about 15 meters) that will fit to small fields .
IIt is used in calm wind, but you might put a rubber band at each blade tip to improve its wind resistance.
If you throw it correctly ,Zebra 3 will have a range of 15m,moving upwards at race end due to its inclined blades and then go down like an helicopter for an easy catch.