Though simplistic I have always liked this description/overview of Judaism.
Overview of Judaism:
Around 2,000 years ago a non-Jew told Hillel, a famous Jewish teacher, that he would convert to Judaism if Hillel could teach him the whole of the Torah in the time he could balance on one leg.
Hillel replied ... "What is hateful to yourself, do not do to your neighbour. That is the whole Torah; the rest is just commentary. Go and study it."
The Bare Essentials of Judaism:
About 3500 years old
Began in the Middle East
Founded by Abraham and Moses
Parent faith of Christianity
Jews believe that there is only one God
Jews believe that the Jewish People are specially chosen by God
Jews worship in Synagogues, their spiritual leaders are called Rabbis
The Jewish Holy book is the Hebrew Bible, or Tanakh, especially the first 5 books, called The Torah