Keeping Up with the Steins (2006)

In toney Brentwood, Benjamin Fiedler prepares for his bar mitzvah; trouble is, he understands neither its meaning nor the Hebrew, and his parents (particularly his successful-agent father) are planning the most lavish party possible.

Benjamin wants his dad to give him some space, so he gets an idea: to invite his grandfather, who left the family years ago and for whom Benjamin's dad has an intense dislike, to come two weeks early. Thanks in part to grandpa - and to the immediate family's love - Benjamin may have a shot at figuring out what it means to be a man.