In a certain colourful school there was Class 1B. It was there that Zosia, Kuba, Ada and Michal met every day. They loved playing together, lessons and fooling around with Mrs Kasia. One day, when they came to school early, they noticed that there was a shiny new locker in their classroom. It was painted with colourful stars and in the middle was a small drawer with a mysterious lock. - Look! - exclaimed Kuba. - This drawer wasn't here before. The children came closer. They tried to open it, but it was locked. A note lay on top: "Open me if you dare!". - Maybe we can find the key? - whispered an excited Ada. Zosia started searching the benches, Michal checked under the chairs and Kuba even looked in the dustbin. Everyone was very curious to see what was hiding in the drawer. Suddenly Ada shouted: - Look what I found! She was holding a small golden key in her hand. The children gathered around the drawer. Everyone's heart was beating faster. Ada slowly slid the key into the lock. They heard a quiet click.... Suddenly, a strange coloured light began to come out of the drawer!