there IS such a cartoon, and you watch it while YOU browse! its called “etherape” and its free on Ubuntu!
go to terminal, do “sudo apt-get install etherape” and then when its done, go into “Applications->Internet->Etherape (as root)” and set the interface to “wlan0” if you use wireless or “eth0” on ethernet. watch IP, TCP protocol levels, all sorts of color coded real time traffic animated on screen for you like on those downloading documentaries! awesome! try private tracker or just google something on browser and watch etherape twinkle!