A boomerang is a flying shape that returns to you after you've thrown it! It is a well known weapon used by some Aboriginal Austrailian people for hunting, but they're also great fun for having a go with at home!
The YouTube video below gives simple instructions of how to make a cardboard boomerang. The secret to their success is to master how to launch them; the video shows this well, and Mr McNally has also made a video demonstration too (it's below the YouTube video).
You can just have a go at making one, but if you want to you could investigate how to make the 'best' boomerang (the one that returns best) by:
To give an idea of the 'best return', the distance that the boomerang lands from where it was launched can be measured. Other challenges might be to set up a target on the floor and aim for it , or a vertical cane or broom where the aim is to fly the boomerang around it. Family members could compete!
There are loads of ideas, template etc. on the web that you could try out.
Why not have a go at decorating your boomerang with Aboriginal art? There are lots of images for inspiration online, and here are a couple of YouTube tutorials that might be helpful: