If you are referring to the 2015 expansion focused on group activities and clubs:
Watch the official gameplay trailer to see the new family dynamics and milestones in action: The Sims 4 Growing Together: Official Gameplay Trailer YouTube• Feb 23, 2023 The Sims 4 Juntos
: While infants were added for free, this pack unlocks exclusive mechanics like Infant Quirks (up to 3 per child) and developmental Milestones (e.g., learning to roll over or crawl). If you are referring to the 2015 expansion
: You can set specific relationships between household members, such as being "Jokesters," "Competitive," or "Difficult". Both packs center on social and family connection
"The Sims 4 Juntos" typically refers to either the expansion (known as "Creciendo en Familia" or "A Vida em Família" in other languages) or the Get Together expansion (often translated as "¿Quedamos?" or "Juntos e Misturados"). Both packs center on social and family connection.