How can you tell the difference between a boy and a girl kitten?

One way to tell the difference between a boy and a girl kitten is by looking at their genitalia. Male kittens have a visible scrotum and penis, while female kittens have a small slit called a vulva. Another way is to observe their behavior and physical traits, as male kittens tend to be larger and more muscular, while female kittens are typically smaller and more delicate.