This paper model is the Wooden Sword, a weapon in the Kingdom Hearts video game, the papercraft is created by Mickey103. It is wielded by Sora and Riku at Destiny Islands, and again by Sora at Hollow Bastion, when Riku takes the Keyblade.
The Wooden Sword is also seen in Kingdom Hearts Birth by Sleep as Ventus's practice weapon before Terra gives him the Wooden Keyblade. Also, a similar sword is seen in the back of the Usual Spot in Twilight Town. [Source: wikia]
You can download this papercraft model template here: Kingdom Hearts - Wooden Sword Free Papercraft Download