For the first two mechanisms, I explored a lot on paper folding techniques. The first mechanism is like a rotating tunnel, which reveals different parts of the paper which were originally hidden, simply by rotating the two sides. I painted the two sets of exposed parts with different colors, so that different parts can be revealed when the motor drives it to rotate and transform.

I fixed one side of the folding to my prototype cardboard frame and then attached the other side to a servo motor. By rotating the servo 170 degrees back and forth, we can see two different parts displayed through this mechanism. I used two small plastic round pieces to better secure the two edges of the paper to the frame or motor.

It could be used for rotating if the folding gets to a longer scale and different patterns can be shown on the two sections.

https://drive.google.com/file/d/1ekHFYpJgOWvcoMoGr9WQvYxfva7cwdu4/view?usp=sharing

The second one is more like a folded book made of paper, also achieved through paper folding. It's moved by attaching one side to cardstock and using an internal servo and a movable frame.

If it were wearable, I might choose a smaller scale and add some detail to give the folds a sense of opening and closing. I also think it would be interesting to put a blinking LED inside, which could change color based on different moods or triggers (such as distance).

https://drive.google.com/file/d/1bjQwMinQ0Bs2pZDguXUpqNJ6nH0b2_gI/view?usp=drive_link

Finally, I wanted to explore DC motors. Integrating this with my previous project, I found a way to use a DC motor to pull the traction cable for the earhangs. Also with the DC motor, I can add more units and use one motor to make them all move together with the strings attached. I know that using a servo motor to push a hinged part might be more intuitive and convenient, but to experiment with the use of DC motors, I wanted to try this approach here.

https://drive.google.com/file/d/1fcqcIyChX64DIuBbwdhhoQexDH1YPjY0/view?usp=drive_link