“Freeze Frame: “Smallfoot” (PG), “The Children Act” (R), “Night School” (PG-13)

The themes in the animated goof “Smallfoot” may be a bit heavy-handed, but it’s still a modestly amusing musical lark. Channing Tatum provides the voice of Migo, a giant yeti living in an isolated village atop a hidden mountain in Nepal. He’s banished when he claims to have seen a smallfoot…that is, a human… which is believed to be mythical. The voice cast includes Common, Zendaya, LaBron James and James Cordon. The mixture of slapstick humor and social commentary doesn’t always work, but “Smallfoot” has its small charms.   If you think actress Emma Thompson can do no wrong, you’ll find more ammo for your argument in “The Children Act.” This sturdy British drama is about a judge, played by Thompson, whose marriage to professor Stanley Tucci is on the rocks. At the same time, she’s presiding over a touchy trial that pits the healthcare of a minor against the concept of religious freedom. The story has an air of artificiality, particularly in the pivotal relationship between the judge and a 17-year-old boy involved in the case. But Thompson ably carries the film on her very British shoulders.   The potentially incendiary comic combo of Kevin Hart and Tiffany Haddish…