Cardboardia 1

A group of friends must use their ingenuity to save a parallel world that can only be accessed through cardboard boxes in this series starter from Black Sand Beach author Richard Fairgray and Lucy Campagnolo. Perfect for readers ready to step up from Jelly.
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 no mistake that the three friends have been transported through their cardboard portals. Each has a special talent they never knew existed. And only when they figure out to harness them together will they be able to stop the destruction.