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RetrogradeRenegade
Since: Jan, 2010
79.161.33.49
Since: Dec, 1969

I saw this show in the 90s, but it could be older. It began with a stop-motion sequence in an old theatre, where this creepy old man was going to show us a cartoon. He had a spider for a friend/pet. Then there was an animated cartoon, usually about a kid who was naughty and got punished for it in some insanely creepy way. One cartoon had a kid who stole the sun and kept it in a jar under his bed, but then his parents almost found out and he had to let it out. It burned him to a cinder. Another had a kid enter a shop where he was turned into a doll. I just can't remember the name of the show, and google is being unhelpful.
Also, a possibly related show (I think it had the same animation style) frequently featured the big bad wolf. Dunno if that helps or not.