Oops...A Pony Whim

So...I bought the kids a pony for Christmas.  I may  very well be in over my head.  This will be a huge learning experience for us, as the children and I know NOTHING about horses and the like.  However...'Tina' is adorable and sweet and social and gentle and playful.
And we love her.

But...Now that I have set such a precedent...what in the world will I do next Christmas?
Perhaps A unicorn...