Avatar: Seven Havens

Longtime Avatar fans who want new lore and a playful streak will feel at home, and so will newcomers who like a world that reveals itself slowly. Pavi chases a jewelry seller through a festival to free some beetles and wrecks the place, which shows you the tone. The twins sharing a half-remembered song their mother sang is what pulls you toward the mystery.

The animation is simple for the first few episodes before it settles; each one adds a piece to season-long mysteries, so watch in order.