Activities for Christmas. Write a letter to Santa Claus or Wise Men

In my opinion, Christmas time is a good opportunity to teach our kids activities related with it.
I propose to write  a letter to Santa Claus or Wise Men.

Wise Men

For first, second and third course of Primary Education I recommend the following letter. Children only have to fill the gaps.

Letter to Santa Claus

For fourth, fifth and sixth course of Primary Education, children can write a letter to Santa Claus or Wise Men.

You have to explain the parts of a letter: openings, body, endings... Bellow, you will find and example.

Parts of an informal letter

From my point of view, this activity is very useful to enhance writing skill. What do you think? I await your comments.