Structured like a series of vignettes based on the titular American writer’s works, this stop motion animated film embraces how playful and bizarre the medium of clay can be, showing us everything from whimsical jumping frogs, to Adam and Eve, to Satan himself. But even if The Adventures of Mark Twain might get too weird even and rough around the edges even for a hardcore animation fan, there’s an interesting emotional undercurrent here that deals with unanswerable questions on death and the meaning of life. Thanks to a lively and talented cast of voice actors, this fantastic voyage keeps itself grounded to something tangible and heartfelt, and never gets swept up too far into the clouds.