Future Me Email

I remember in elementary school one of my teachers gave us an assignment to write a letter to ourselves at the beginning of the school year.  She kept them the whole year and gave them to us at the end of the year.  It was amazing how much my classmates and I had learned and grown so much over the school year.  Now there is a website where you can write yourself an email and enter the delivery date, which could a month later or 10 years later!  Wouldn't it be interesting to receive an email from the past "you" in the future?  Or better yet, have your students write emails to themselves.  Here is the link:  http://www.futureme.org/what.php