Yep, there's additional kits above and beyond the basic kit. And it'll work with standard Legos...the "brain" and a whole bunch of moving parts (gears, wheels, pulleys, axles, etc.) are rather specialized, but they're all made to the same "snap together" design as regular Legos.
Legos are really an example of marvelous engineering, if you look closely at them. I marvel at the design and development that went into even the simplest brick. But then, I also argue statistics with illiterate idiots, so maybe I need better hobbies.