What is a Bar Mitzvah?
At the age of 13 a Jewish boy is required to take responsibility for commandments (mitzvahs). The Torah (first 5 books of the bible) enumerate 613 mitzvahs. Halacha or Jewish law clarifies those mitzvahs for daily use.
Up until 13 years old the parents are responsible for the mitzvahs.
On the Saturday morning Jacob will be leading the service and reading from the Torah. This will his first opportunities to perform these mitzvahs as an adult.
After such an honor we will celebrate with a lunch and a party.