The Barbamartians possess the ability to change their colors and shapes in a way that is more pronounced than the Barbapapa family. This ability allows them to blend into their surroundings and create illusions, which they use to play tricks on the Barbapapa family.

The Barbapapa family initially reacts with curiosity and excitement upon the arrival of the Barbamartians. However, as the Barbamartians begin to play tricks and cause mischief, the family members feel frustrated and confused, leading to a mix of emotions ranging from joy to annoyance.

The Barbapapa family learns the importance of understanding and accepting differences. Through their interactions with the Barbamartians, they realize that while the Barbamartians may be mischievous, they also have unique qualities that can be appreciated.

Barbapapa takes the lead in trying to befriend the Barbamartians. Motivated by his innate kindness and desire for friendship, he believes that understanding the Barbamartians will help bridge the gap between their differences.

The Barbapapa family faces challenges in communication due to the Barbamartians' playful nature and their tendency to change forms, which makes it difficult for the Barbapapa family to understand their intentions. This leads to misunderstandings and humorous situations as they try to connect.