Check out the Kano Kit – it’s a DYI computer-building and programming kit.
Also EV3 is a lot of fun with flexibility to design and program its functions – comes with several sensors.
We built and programmed a quad-controller arcade console.
This may be of interest to Oscar: http://www.instructables.com/id/Raspberry-Pi-Controlled-Aquaponics/
Some of the junior highs are using Arduino. Have fun!