We made Burping Billy. Billy is made mainly of cardboard and wires. He has a sensor on his head, and a servo motor for his arm. He also has a rotating hat in his head. Two yellow LED eyes are in his head also. When you get near the sensor, he waves his arm, then says "Hello!" After that, he waves his arm as says "Goodbye!" After that, his hat rotates continuously, and his two eyes turn on. He waves his arm, and says "My name is Burping Billy!" He then burps, and finally waves his arms. The most challenging part of the project was his hat and keeping it on. What happened was the sensor kept getting in the way of the rotation, causing the hat to fall off. With a few pieces of cardboard to elevate it, we fixed the problem. It was very fun to write the code. Which I guess is the whole purpose of this project. It's really cool to program the arm to move, and then it actually does! It was a great feeling to think that I actually made him. I learned about patience, creativity, and most importantly dealing with issues. Things didn't always go the way we planned, and we had to keep going and think of something else. I am very happy with how Billy turned out!