I made a lever for two buttons that I had, as I wanted to make a robot arm. My robot arm failed, but this model came out perfectly. It comes in three parts, the body, the lever, and the pin. If you are comfortable with it, you can glue the top of the button upside down into the hole in the body, so that you can press the lever upside down. Or, if your button has caps, like mine, you can glue those into the hole the opposite way as well. Then, you can simply put the buttons in and code them with the pins sticking out. Then, you can align the lever with the hole in the body, and insert the pin. Now, instead of pressing two buttons to control things, you can make this lever, and move it back and forth to press the button.
The author marked this model as their own original creation.