Here is how your letter kit will look;
Supplies Needed; Print out of the three templates below, a large letter envelope, and a standard letter envelope.
Fill in the necessary areas in the letter, certificate, and address label. Print out the completed papers. Fold the letter and certificate and seal them into the smaller envelope. Address the small envelope to your child, with Santa's address (on letter) as the return address, add a stamp to the small letter then seal it into the large envelope. Affix the mailing label to the large envelope, and take it to you post office for the proper postage amount.
Your returning postmark will look like this;