In Brzęczyszczyrz, where even storks wore colourful pea-coloured socks, there lived Mr Piegus, an inventor with a moustache so curly he could tie bows with it. His workshop was full of screws, cogs and things that certainly had no right to exist, such as self-brewing tea or a chattering alarm clock that woke up all the neighbours but always put its owner to sleep. This was the home of four friends: Ola (a master of sarcastic jokes), her brother Staś (a well-known doughnut eater), energetic Maks (who could recognise every bird call) and Lena (who always had at least two other people's hats on her head, which she borrowed without asking). One hot afternoon the four of them were mercilessly bored. They were loitering around the market square when Staś got the idea to have a look at Mr Piegus. "Apparently something exploded there recently that turned brick flowerpots into flying saucers!" he exclaimed excitedly. So they crept on tiptoe up to the window of the workshop. There were strange sounds coming from inside: first a dulcimer tinkling, then a clatter, and finally a loud sneeze as if from a tuba. Lena, like Lena herself, couldn't stand it: "Let's go!" - and before anyone could protest, she was already knocking on the door. They were opened by Mr Piegus with a moustache arranged in the shape of a question mark. "Oh, children! I'm just testing my latest thing. If you're not afraid of a bit of a mess..." - he began mysteriously. Intrigued, the friends went inside. Inside was such a mess that Ola choked on air. In the middle stood a huge machine, all buttons, levers and tubes. Next to it lay a box with the words: "CAUTION: DO NOT TOUCH (I touch at my own risk)". Mr Piegus leaned over the machine. "This is... er... Hipper-Super-Spring Shape Converter! I don't know exactly what it does yet, but it already works amazingly! And very loud!" - he smiled broadly. The friends didn't even have time to ask what it was all about, because Staś - of course - inadvertently stepped on the red button. A sheaf of green foam shot out of the machine and the workshop was filled with the smell of baked pancakes with mustard. Lena put a big screw on her head (thinking it was a helmet), Maks ran away from a flock of whistling screwdrivers and Ola tried to turn the machine off by tapping it with a pencil case. Suddenly the whole machine shuddered, sparked and.... At the same moment, the workshop door slammed, and from behind it came a voice that no one expected: "Halt, hands up! Hand over what you have found immediately!"