Christmas gift, surprise or request?

A Christmas you risk a surprise or satisfy the request, more or less realistic of babies? Flying up letters asking where small tractors pests, real horses, perhaps with a jockey or spaceships players, follow the directions, even from the famous letter to Santa Claus Or intervene drastically changing dreams and desires?

My daughter is still too small, and for now has not required but I remember Christmases sad disappointment and unforgettable Christmas under the tree because I just found the doll I wanted a really big dilemma.