That was pretty cute, but I bet you've got to have a nice cube for that. A lot of cheap cubes would jam or explode in that machine - which would also be kind of cool.
I used to love regular, then technic lego when I was a kid. I think I might be about to love it again as an adultYa, it's all lego. Bluetooth controlled by the phone. You can buy the parts here: Lego.com