I do this every year for my kids...PortableNorthPole has a great service where they allow you to customize the message with your child's name, age, pictures, etc - so that it really is tailored for your child. Even from last year to this year, this company has made extraordinary changes! Make sure you have pictures available on your computer when you set this up - you won't be disappointed in this! They send the link to your email so you can set it up and use it when you want to. Disney also has a video message from Santa FREE!
You can also get a call from Santa - I haven't done this yet, but will later today!
Here's a place where your child can call Santa and leave his/her Christmas list!
Here's a link to a free printable letter or email from Santa! I'm going to print it, put it in an envelope and pretend it came in the mail!