Tune in to Happiness!

Imagine, Felia Iriskin's parents are afraid of their own son! After all, he often crashes, like a thunderstorm, makes noise like a tropical downpour, and sweeps everything in his path like an avalanche from Mount Everest. For his fifth birthday,... Felia receives an unusual gift from his inventor grandfather - a device that measures happiness, or a happiness meter. In a bad mood, Felia breaks it, and... the whole world around becomes gloomy like Felia himself, and his parents suggest strange things: throwing slippers at the wall, tearing the wallpaper, indulging in salty cake, and crying together to feel sadder.
How can everything be returned to normal? For this, Felia will have to unravel the mystery of the happiness meter.