This is the only show on Nickelodeon that is worth watching, in my opinion. Not only is it appropriate for even the youngest child (unlike most cartoons), adults love it too. It is one of the most successful shows on Nickelodeon right now, and it will be a dreadful mistake to cancel it after the third season. What we fans want is not a spin-off (although that is better than nothing), what we want is a fourth season. Keep Jimmy Neutron on the air!