Letters for my depressed son

I am going to start from the beginning. My daughter passed away from SIDS. Of course it rocked our whole world, the pain doesn't go away but my husband and I have started to learn how to live again. But it really took a toll on my four year old son Leo. He was just starting to get attached to her and really love her when she passed on. It breaks my heart because he is so down in the dumps, one of the only things that brings him joy is checking the mail. So I had this crazy idea.. if anyone would like to help me turn my little guy into the happy four year old he is supposed to be would you please send him mail.. It can b literally anything. A photo, a drawing, a postcard, a note, a coloring page anything you can imagine! If you would help me get my son out of this slump of depression I will be forever grateful. And we will always write back!! Just comment below and I will give you our address! Thank you again for helping me, and for helping my little boy. As a mother there is nothing you won't do to help fix your child from being extremely sad. That's why I am doing this for my son.. Because I am his mother and there is nothing I won't do make him happy.