Imagine living in an incredibly beautiful world that exists right under your feet! Well, that s just where a boy called Happy and his family live. It is a world full of brilliant colours and crystal caves that sparkle and shine in colours of the rainbow. One day a curious Happy discovers a tunnel that he has never seen before. It reaches up, up, up, up so high that he wonders where it will end This is the beginning of an unexpected adventure and an unexpected friendship. Join Happy and his new friend Ben as they learn about each other s amazing worlds. As they explore the happy surprise of this very special friendship, you can be their friend too.