One sunny morning, Lena was playing in her room. Suddenly, there was a piece of colourful blanket sticking out from under the bed that hadn't been there before. Lena pulled the corner and saw that the blanket was as soft as a cloud and very, very light. As Lena threw the blanket over her shoulders, something amazing happened - she looked at her hands and... they were gone! Lena was invisible! "What a superpower!" - she whispered excitedly. She ran to the kitchen, where her mum was preparing breakfast, but her mum didn't notice her at all. Lena took a quiet step, and even the cat Purrs didn't sense anything. Suddenly, Lena heard a strange sound coming from the garden. Should she discover the secret of the garden using her invisible blanket? Lena carefully opened the door and....