The relationship between blood relatives is super unique. The relationship becomes much more important if you spend some time growing up with them. Same as your sibling, this is the one relationship that can last a lifetime. But there’s still some difference between a cousin and any other relationship in your family. Your uncle or aunt’s kids understand you like a friend while also being family. So, when it comes to their birthday, wish your dear cousin a very special birthday with this fun-filled card.