Kevin and Fede experience their first sex ed class with none other than their infamous P.E. teacher, Bruno Moron.

In the aftermath of Ricardo Mendoza's death, Kevin struggles to come to terms with his own mortality, as well as his growing love for Ricardo's sister.

Kevin's family pays a visit of condolence to the Mendozas.

On the first day of gym class, Kevin is determined to display his manliness as the sixth graders meet their new P.E. instructor and are given the opportunity to choose between two contrasting activities.

Will Kevin and Fede become part of a clique or form one of their own?

Kevin becomes a man in more ways than one.

Kevin learns that when they are shared with another person, even sad events can teach us to appreciate life.

Unlike Kevin and Fede's previous school, this one is co-ed, arousing some anxiety in them. Fede even confesses about a nightmare in which he arrives at school naked.

Kevin's neighbor and childhood playmate, Cata, is starting the same school as Kevin and Fede. But she is sporting a new, more mature style and insists that she be addressed by her full name, Catalina.

"Toda la vida" ("All My Life") is the theme song which opens the Colombian version of the American hit series The Wonder Years. The song is a cover of a hit Italian song,"Tutta La Vita", written by celebrated composer Lucio Dalla. Sung by Mexican singer Emmanuel, this version was number one on the Latin charts for three weeks in 1984, replacing a different version of the very same song sung by Cuban singer Franco.

It's the summer of 1985 and 12-year-old Kevin González is spending his time playing banquitas, a Colombian form of street soccer. His older brother, Leo, is forever tormenting him, while his best friend, Fede, does his best to intervene.

Los Años Maravillos incorporates genuine archival news footage, giving us a sense of what it was like to live in Colombia in the mid 1980s. In this segment, we see reports regarding the civil conflict involving rebel forces used as a backdrop to the family drama unfolding at the González dinner table.

Albeit tragic, the incident with the hamster has changed the dynamic between Kevin and his older brother Leo forever.

In the wake of the hamster incident, Kevin and Leo's relationship is strained, to say the least.

As Fede grows increasingly concerned for the health of Nico, the hamster at the center of his and Kevin's science project, Kevin's brother Leo's behavior becomes increasingly erratic.