Matt was just ten years old when he had to ascend the throne and become king after his father's death. He discovered that being a king is not as much fun as one might think, with many restrictions that prevented him from being like other children, finding friends, and just playing.

When three kings declare war on his kingdom, he decides to fight them and, although not an adult and perhaps because of this, he manages to make peace using his good nature and human compassion.

King Matt the First was originally written by Dr. Janusz Korczak, whose educational doctrine was belief in the power of children, as reflected in King Matt's thoughts and deeds. Artist Itzchak Belfer adapted and illustrated it to suit young children and to expose them to one of the most beloved works of 20th century literature.