One sunny morning, Lena, a seven-year-old girl with pigtails, was playing in the schoolyard with her best friend, Frank. Suddenly, while playing hide-and-seek, Lena noticed something strange behind the old school fence. Between two green bushes, something like a door shone, although she had never seen it there before. "Come on, Frank!" she called out excitedly. "Look!" Frank came running, and together they walked closer. The door was tiny and colourful, and it had a golden key in the middle of it. "Do you think we can open it?" Frank asked in a whisper. Lena touched the key and... the door creaked open slowly. The scent of raspberries and honey wafted from behind it, and beyond the threshold, a beautiful forest stretched, full of glowing flowers and singing birds with feathers in rainbow colours. "Shall we go in?" Lena asked with wide eyes. As the children took their first step inside, they heard quiet laughter and saw a small winged figure flitting between the flowers. What was it? Where had it come from? At that moment, a light breeze blew, and the door behind them began to close slowly...