This. Is. Awesome.

I was a CS student, but we had to take some intro Computer Engineering/circuit logic theory classes. I loved it, but we only did things on paper (and I didn't want to buy a whole breadboard kit just to play with simple logic circuits, etc...). I wish this was around when I was learning because I really wanted to play with making more complicated setups than we did in class.

This is like the Balsamiq of Circuits with the added bonus of running the stuff. Yes, being able to snap wires to a grid would be nice, but I'm having a blast with this right now.