Celebrating a special birthday? Leave these little guest book cards out for your guests to fill with special wishes and messages for the birthday girl or boy. A neat black and white design on these cards will go perfectly with just about any birthday theme or decor. The best part about these guest book cards is saving them years later and revisiting those heartfelt messages, especially if they were left for your children at a very young age. That way, they don’t miss out on these special messages!