The term "90s kids" typically refers to individuals who were born in the 1980s and grew up during the 1990s. While someone born in 1978-1980 would have been 10-12 years old during the early 1990s, they are not usually considered "90s kids" in the common sense of the term.
The term "90s kids" is more commonly associated with those who were born in the late 1980s or early 1990s and spent a significant part of their childhood and formative years during the 1990s. These individuals would have experienced and been influenced by the popular culture, trends, and technologies that were prevalent during that decade.
Of course, the specific age range and cultural experiences that define a "90s kid" can vary depending on individual perspectives and the cultural context of different regions. People born in 1978-1980 may have some memories of the 1990s and may have been exposed to elements of 90s culture, but they are more likely to identify with the cultural trends and experiences of the late 80s and early 90s rather than being considered typical "90s kids."