Slumberland will spark your imagination, and it's a cute and charming film that lets Jason Momoa’s goofiness shine. That said, while I give the film props for its scope and creativity, it ultimately falls flat when it comes to executing its main focus of learning to deal with grief. It just wasn’t as emotionally engaging as it should have been. I understand it’s a family film, but, c’mon, pull at my heartstrings just a little. With a better script, this film could have been the kid’s version of Inception.