What is required for a bar-mitzvah?
Answer:
When a person becomes bar mitzvah, the most important thing is that he begins performing the mitzvos of the Torah.
Therefore, his parents must ensure that he has a pair of Tefillin.
Beyond this, the custom is that the boy is called up to the Torah (for the Maftir section on Shabbos), and a celebration is made in honor of the occasion.
Best wishes.
