There was an old tree in Tosia's garden that provided cool shade in the summer. Tosia loved to sit there and make up all sorts of stories. One afternoon, when she was searching among the leaves for a lost ball, she noticed something unusual. A small green door had appeared in the thick trunk of the tree, which she had never seen before! The door was decorated with silver stars and had a tiny handle in the shape of a frog. Tosia knelt down on the grass and peeked through the keyhole. On the other side of the door she could see colourful butterflies hovering over a red lake and funny, purple mushrooms that moved as if they were dancing. Suddenly, the door creaked softly. Tosia heard a quiet little voice: - Hello, Tosia! Do you want to visit our world? Tosia held her breath. What is on the other side? Would she decide to cross the mysterious portal?