Trivia Gumball Machine with Raspberry Pi and Python

My neighbor was cleaning out his kid's old stuff and gifted me two gumball machines. I replaced the cracked glass top with a laser cut acrylic cube and mechanized the dispenser. There is a Python program running on the Raspberry Pi that allows you choose a trivia category (originally Science, Adult Themed, Burning Man History, or Random). If you get 3 questions right out of 5 tries then it dispenses a gumball. I've since modified the program so the categories are general science, math, physics, and local history. It now lives in my classroom. The program contains a list of my current students and it only allow them one attempt every 24 hours.

More details about this project, including some of the code, can be found one my website: