Duality and unity: A mirror, which reflects an image back onto itself and creates a sense of duality and unity.
Continuity and discontinuity: A hinge, which allows for movement between two objects and creates a sense of continuity and discontinuity.
Potential and actuality: A battery, which stores potential energy and releases it as actual energy.
Tension and resolution: A rubber band, which stretches and creates tension, and then snaps back to its original shape, resolving the tension.
Diversity or unity: A puzzle, which combines diverse pieces to form a unified whole.
Boundary or interface: A door, which separates two spaces and serves as a boundary or interface between them.
Confusion or clarity: A clear plastic bag, which allows for clarity and understanding of the contents, compared to a opaque bag, which creates confusion.
Change or stability: A mobile, which is constantly changing and unstable, compared to a stationary object, which is stable.
Creativity or conformity: A blank canvas, which allows for creativity and originality, compared to a pre-made image, which conforms to a predetermined pattern.
Vulnerability or resilience: A balloon, which is vulnerable to popping, compared to a rock, which is resilient and difficult to damage.
Complexity or simplicity: A complicated machine, which has many parts and is complex, compared to a simple object such as a spoon.
Integration or separation: A puzzle, which combines diverse pieces to form a unified whole, compared to scattered pieces, which are separate and disconnected.
Novelty or familiarity: A new toy, which is novel and exciting, compared to a familiar toy that has been played with many times.