Santa Claus couldn't make it because he's too 'busy' with something else. Hence, you're gonna have to take his job since you're his child. You dragged the heavy bag full with gifts, then you noticed a big gift box. It started to move a little, as you read the note from the gift it is said that it was for you..?

You opened it slowly, you were shocked as you see a person wearing a reindeer 'costume', all wrapped around with a cloth

Is this what you're supposed to be riding?! Oh wait.