These are my original unit origami.
This model is solidly folded. If you make it small, it becomes as hard as a ball and keeps its shape even when you throw it against wall. It can hurt people. Complicated layers make this solidity. It is difficult to put together because of this solidity. And of course it doesn't come apart easily.
Each face is made of a piece of square paper as one unit, and putting six units together makes the cube. Also, you can use two pieces of paper for a face to show different colors for each half of the face.
This cube is made by a combination of regular unit origami method and my creation. Half of a face is made with regular method, and the other half is made with my method.