Santa letter for older kids. Discover Pinterest's best ideas and inspiration for Santa letter for older kids.1. Address the letter to the specific child. If you want the child to believe the letter is really from Santa, you should address it to that child. So, yes, my love, Santa is very much real. This letter can help reassure them, or at least keep them from telling their siblings. Free to download and print. Start your letter with a personalized greeting from Santa himself. Write "Dear" and your child's name. Are you interested in sending children and families some holiday magic this season?