I agree with everyone else that it's more of a discuss in person type of thing, rather than shoot everyone the same email kind of thing.
Also, I think the wording itself is a bit off putting. I like the previous poster's suggestion of "my wish list to santa" or something similar. In my family, passing around lists of ideas for each kid is not just common, but expected. And they are lists of ideas of what the kids would like, not a list that basically says-here are ideas because we don't want you to buy other stuff. I think there's a subtle difference and your wording in the letter leans more towards the latter....and that can come off as rude.