2 meter-long cardboard tubes - these can be obtained by finishing a roll of wrapping paper. One must be slightly larger in diameter to the other; the larger one will be the scabbard, so you need to be able to fit the smaller one inside it.
Thin Cardboard - Can be obtained from most cake set boxes.
Thicker cardboard - most boxes
A leather belt - don't worry, you will still be able to use it after use, the scabbard is removable!
Any decorations you could add - Anything you can get your hands on!
String (optional) - Will make the handle considerably more comfortable
Strong glue - I used Uhu power for this.
A steel ruler
A pencil for marking
Even though it is made of cardboard, it is exceptionally strong, and great for playfighting, filming and ornamental purposes alike, so lets get building!