For the penny hockey project, I made a pinball machine. It uses all of the STEM principles in it's design to be a fully functional game. For the paddles and buttons to work, I was able to use an Arduino. It uses 2 VEX servos to turn the paddles 100 degrees. Below you can see the wiring which took a while to figure out. The paddles are made using poster board, and the rest of the project uses tile and wood. You can see the Half-Life 2 logo laser engraved on the tile.