For this assignment, we built three mechanisms out of card stock paper, based on those used in traditional Japanese Karakuri puppets and automata.
• Cam D
In Cam D, the rod slides repeatedly in a linear motion horizontally. The motion was created by turning the shaped disk inside to change the rhythm of how parts move along the contour of the disk. Any roughness of the contour will make the mechanism stuck. Based on the back-and-forth movement, we chose a turtle sticking its head out of the shell and back as our decoration.
• Crank B 
In Crank B, the rod sways back and forth by a linkage mechanism. It uses a hook-shaped axle to convert a rotation to a linear motion and vice versa. Room is essential between parts and axles, which makes the motion smooth. Based on the arc trajectory of the linkage point on the rod, we chose the movement of shooting a basket as representation.
• Gear A 
In Gear A, the gear turns horizontally to the handle. This reminds us of ferris wheel and we got the idea of making it a lollipop ferris wheel. To realize this, we created another small gear (lollipop ferris wheel) supported by an iron wire as the bearing. Measurement is important to make two gears fit each other. The rotation keeps the lollipops being fed to the fixed tongue and being licked.