In which situation are toddlers and preschoolers least likely to laugh?

Toddlers and preschoolers are least likely to laugh in situations involving something inappropriate. At this young age, their understanding of social norms and what constitutes appropriate or inappropriate behavior is still developing. If they encounter a situation that seems unsettling or confusing, such as witnessing an inappropriate incident, their response may be serious or uncertain rather than joyful.

In contrast, other scenarios such as sharing toys often lead to positive interactions and laughter, as do playful activities and physical engagement like being tickled, which typically elicit giggles and joyful reactions. At these ages, children thrive on social play, humor, and physical affection, which resonate more strongly with laughter.