It was a collaborative effort between myself and the three Aikido kids, that started with a not-quite-straight branch that had been pruned off a feral cherry tree on our property a couple of years ago. With various knives we carved away most of the excess wood, fighting with the tiny knots to create a flattish "blade" and a smoothly rounded hilt free of bark. Then we sanded and stained it.
Shown is the detail where the blade joins the hilt. The sword is strong and pretty light, and about a metre long, just right for practising shomen cuts at home.
The best part is that the kids helped with a grand tidying and vacuuming afterwards, and our living room carpet is now once again a wood-shaving and sandpaper-dust free zone.