In Santa's Christmas village at the North Pole, the elves celebrate special days all year round. Apart from Christmas, though, nothing is more exciting to a scout elf than a birthday--and elves celebrate birthdays with a tradition that goes back thousands of years. Now, at the request of children from around the world, Santa has given his scout elves special permission to share that birthday tradition with the families they love. An elf cannot come to a celebration, though, unless it is invited.