If you like compact projects then there’s a good chance you’ve picked yourself up an Arduino UNO (an open source electronics prototyping platform http://www.arduino.cc/)
There’s a great little tutorial here on how to get the two cooperating with each other:
It takes a little time but you can get one of the smallest computers around programming one of the smallest electronics boards. Great for portability! These two gadgets make for an awesome team to tinker around with and make all sorts of fun stuff with LED’s, robots, sensors, infrared, video, sound, etc. I’ve only had one electronics class in my life and I was still able to get several little fun projects going.