South Park for kids. In one episode (about the meaning of life) you have all the planets of the solar system singing an upbeat showtune to the kids about how insignificant and meaningless they are... I legitimately love this show.

This is Adventure Time without any long arcs or character development. Exemplary structure and animation variety, ingenious integration of 4th-wall-breaking/meta episodes & moments, even some good treatment of heavier ideas/problems. All you ever get is new small stories though, so if you like S1 you'll like S6, but if you need anything lasting or complex, you'll probably tap out sometime after S2.

best animation ever.

AMAZING