When the relations are based on the physical properties of the stimuli, this type of relational responding isn’t very remarkable. Physical properties just means the way a stimulus looks, sounds, smells, feels, or tastes. In the example of placing the stars in the boxes, the relations are determined by the physical properties (in this case, the size) of the stars. Not to take anything away from your stellar performance, but a monkey could be trained to put objects in the boxes in order of size like you did.
I challenge a monkey to compete with me!