"When Mac, Masie, and Bird find mysterious tokens in their cereal boxes, they're transported to Cardboardia, a magical landmade of paper and cardboard. In this parallel universe to ours, creativity thrives: Every time a box of anything is created in our world, a replica appears there, bringing residents art supplies, food, books, and more. But an evil presence is slowly moving in, threatening to wipe all art and beauty from this paper paradise. It's...