The two main characters are: Filemon, a little white kitten, young and naïve; and Bonifacy, an old, serious black tomcat. Other characters are: the Grandmother, the Grandfather, the Puppy, a fox, mice, 'monsters from the attic', and other creatures. The cartoon is rich in elements of Polish folk legends and traditions.
Leo, June, Quincy, and Annie enjoy music and art, but they enjoy being together and having fun even more. From getting trapped in the mall to being flung across the world, the Einsteins know that together anything is possible!