The most important thing is to get the Arduino IDE working. All of starting, compiling programs and communicating with an Arduino device, especially an Uno.
Also, if that could be shown how to be done on an Android device that would be great. Either by replacing Android with a mainstream Linux distro,
or using some method to dual or vm boot Linux with Android. Another great project would be getting an Arduino device to communicate with an Android program,
either a custom one or Tasker.
Other good Linux programs to have or choose from would be some type of CAD, G Code managing programs, robot frameworks, electronics simulation, circuit board layout,
Blender, RabbitMQ, MariaSQL and Asterisk/Free Switch. There are also now programs that turn Android phones into security cameras, that would be good.
Donations of old Android tablets and phones would be very useful for us, as they are likely to be usable with the above projects. We could also use a few more monitors,
desktops and laptops.