Cuba really enjoyed playing in his room. One rainy afternoon he was once again building a big castle out of blocks. Suddenly his cat, Patch, started scratching the floor by the bed with her claws. Kuba looked under the bed and opened his eyes wide - a small blue door with a brass handle shone in the darkness! - Latka, did you see that? - whispered the boy. The cat whinnied and wanted to go in first. Cuba reached out and carefully turned the handle. The door opened with a quiet creak. Behind them was a narrow, colourful path. On one side, purple mushrooms grew; on the other, a river full of glowing pebbles flowed. Little skylights flew above everything. Cuba looked at Latka and they both walked through the door. Behind them the door slammed slightly. A strange furry creature emerged from behind a large mushroom. He had funny ears, a pink nose and purple fur. He smiled at the children. - 'I've been waiting for you,' he said mysteriously. Just then, the path began to glow green, and far away, among the trees, there was a quiet, strange singing...