everyone in the cul de sac is dead and in purgatory
It was a theory about the show presented in an article on cracked essentailly it said that all the kids are dead. Think about it no parents only mention they until the last episode never leave this little street. Another cool part of the theory is they all died during different time periods such as jimmy dying of lukiemia in 2000. Rolph dying in the 20's. It's all in this article 6 crazy theoires about childhood show. Ed Edd n Eddy is #2 even though reading the other ones this one is by far the coolest and craziest.
http://www.cracked.com/article_19882_6-insane-but-convincing-fan-theories-about-kids-cartoons_p2.html