I understand it is on the Arduino menu on the Mac). You need this same preferences dialog for step two, also. Step 2 isn’t strictly necessary, but it will make step 5 easier. Just check “Show ...

so I built her a "Button Box" based around an Arduino. Open source ... and she's not even 2, so... I've got some time. It's not particularly fancy, stylistically it looks like it belongs in ...

You can read the state of a button using Arduino and a few lines of code. The actual state is shown in the Serial Monitor window as 0 or 1, 0 meaning the button is not pressed and 1 that the button is ...