This is a arabic style, safe to use airsoft knife. It has a handle, the blade a a knife holder. There is the constellation of the hunter Orion in the patern of the blade. The arrow is pointing to the nebula of Orion. It can be used in the night to find it. I can't garrantee that your local game will accept this knife if you make it in PLA. You can make it in a rubbery material to be 100% safe however elastc materials are often arround 50 $ and it will be harder to print.

If the blade doesn't fit in the handle just sand a little the blade extrusion that must go in the handle.