The dancing, singing penguins of Happy Feet return for another dose of eco-themed animation in this sequel from George Miller, which proves two truisms. First, there’s still a lot of mileage in the spectacle of penguins tap, tap, tapping in unison and belting out cover songs. Second, this franchise is not the clarion call to action on climate change that it wants to be. The star of the first film, Mumble (Elijah Wood), is a father now, struggling to connect with his adolescent son Erik (Ava Acres), who feels misunderstood and marginalized because he can’t dance. For Erik, a surrogate role model of sorts emerges in The Mighty Sven (Hank Azaria), a flying penguin who preaches messages of empowerment. After a shifting glacier traps their community of emperor penguins in a vast valley, little Erik will need all the confidence he can muster when he, his dad, and two of his friends are called upon to save the day.