Lego Balisong Knives

Here are two Lego balisong knives, both of my own original design, one of which is double bladed. Theoretically, the double bladed design should work (not slice up the user's hands/arms) if one side of the blades were sharpened. The single bladed knife combines with an extra part to make the double bladed version. As can be seen in the video, although the knives are much lighter than a metal equivalent, they can still be used to do some tricks.