Lena really enjoyed spending time in her garden with her dog Max. One night, when the sky was full of stars, Lena and Max saw strange blue footprints on the grass. Max barked happily, wagging his tail, and Lena followed him with a torch. The footprints led behind a currant bush, where something glowed slightly purple. It was round, cold and looked completely different from anything Lena had seen before! Max sniffed the object and suddenly.... there was a quiet sound: 'Bzzt! Bzzt!" Lena and Max looked at each other in silence as the mysterious object began to float slightly above the ground....