The work at the factory is over. The workers went home and the fairy tale began. Screws and nuts, hammer and plane, chisel and screwdriver came to life. "We've done a good job, and now we can have some fun!" said the hammer. The details made such a noise that Samodelkin, who was flying on his all-terrain vehicle, heard it. He offered to arrange a concert and make musical instruments. The work started and finally everything is ready. A fun concert took place and no machinations of defective parts could prevent success.