Our final yo-yo design is based on the Boston Citgo Sign, a landmark on the Boston skyline. The yo-yo consists of six parts; the yo-yo rim, white cover, citgo triangle, citgo letters, printed circuit board (PCB), and the yo-yo body. Our design features a light-up mode in which the citgo triangle and letters are illuminated due to the translucent material. When the citgo triangle is pressed, it activates a push switch button which turns on two LEDs on the PCB.