How do you control communicating actors? How do you implement an SSH server in a truly functional style? How do you teach middle school students event-driven programming? How are these questions related? This talk will present a tour through Racket's world of thinking in a purely functional manner. It will start with the Universe library, which we use for reaching middle school students, and it will end with a sketch of the Network Calculus dialect, a natural research outgrowth of the Universe.