What punishment does the Judge give Brent Bishop?

Like most young adults, Brent Bishop wants to be popular, and he wants to fit in. So one night he goes to a party. His fateful decision will change his life forever, and end someone else's. At the party, Brent starts hitting on a girl, but she loudly gives him the brush-off. This stinging rebuff embarrasses Brent, making him feel utterly worthless in front of the other kids. Hurt and humiliated, he storms off, determined to end his own life by crashing his car. Brent does indeed kill someone; however, it's not himself but a young lady by the name of Lea Zamora.
Brent is arrested on a charge of DUI and manslaughter and ends up going to court. At the second hearing, the judge, much to the relief of Brent's parents, sentences him to probation. Brent feels mixed emotions; on the one hand, he's glad that he won't have to mix it with all those hardened criminals at the detention center, yet at the same time, he feels that he deserves some kind of punishment instead of being forced to attend alcohol counseling and therapy programs as ordered by the judge.
A few days later, Brent meets with Lea's mother. Mrs. Zamora doesn't believe in retribution. Instead, she wants Brent to atone for his actions. To that end, she instructs him to build four whirligigs, one at each corner of the contiguous United States—that's Washington D.C. plus all the states except Hawaii and Alaska. Mrs. Zamora's father used to make wooden toys for Lea when she was little, and her favorite was a whirligig of a girl with arms that spin in the wind. Mrs. Zamora will never get her daughter back, but she hopes that Lea's spirit will live on in the whirligigs that Brent will build.