Marvel at the laws of physics by throwing and catching a boomerang. Create your own design, keeping to the 'wing' shapes required for it to actually fly, or purchase a proper returning design, and research how to throw them (there's a few angles to get right but it's not too hard once you catch on). Marvel at how it can be thrown one direction and by slicing through the air it can return (with some practice). Get a few boomerangs and friends together in a large field and have fun trying to get consecutive catches together and even learning the flying pattern so well to be able to perform trick catches.