Ada really enjoyed going to school. Every day brought something interesting, but today something really unusual happened. She and Frank were bending down under their desks in Class 1B to see if they had lost their crayons. Suddenly Ada noticed a small, old drawer in the corner of the room, just under the blackboard. It had never been there before! - Franek, look! - whispered an excited Ada. They came closer. The drawer had strange designs, and there was a yellow button in the middle of it. As Franek gently pressed it, a quiet sound came from inside the drawer: "Click!" Suddenly, the lights went out in the whole classroom, and coloured dust appeared around the drawer, which began to swirl faster and faster.... What could be inside? Should they open it? And just at that moment...