Simple, child's sword, belt hanger.

thingiverse

I bought a plastic ninja sword from the Dollar Tree for my 5-year-old son. He kept sticking his toy in his pants waistband or down the back of his shirt, so I decided to make him a holder to carry it on his belt. The belt piece fits a standard-sized kids' belt that I got from Walmart, designed for 4-6 year olds. The split piece is meant to be glued onto the scabbard after you cut off the molded strap hanger and leave a hole behind. This will cover the hole and provide a stop for the holder, make sure to glue the stop with the lip facing towards the handle. Once the scabbard piece is glued on, it should slide into the holder piece easily. I made this quick and dirty holder for my son in no time, feel free to scale or modify it as needed.