It tells the adventures of three friends - Felix Polon, Net Bielecki and Nika Mickiewicz - who attend fictional Professor Kuszmiński Middle School in Warsaw.
There are currently 18 books in the series: A feature motion picture, Felix, Net i Nika oraz teoretycznie mozliwa katastrofa (Felix, Net and Nika and the Theoretically Possible Catastrophe) was released in Poland on September 28, 2012.
He inherited the talent of constructing various things, especially robots, from his father- it saved his friends many times.
Together with his parents Marlene and Peter, grandmother Lucy, his dog Caban (a Black Russian Terrier) and Golem Golem a robot he built, Felix lives on Serdeczna Street in a small family house.
Net Bielecki is quite tall & slim, has blue eyes and a high IQ level.
Together with his parents Lila and Mark, and their newborn twins nicknamed Pompek and Prumcia he lives on the top floor of a Penthouse apartment.
He likes going on adventures and solving mysteries with the trio much more than his actual job, which is controlling the traffic lights.