Here is a video for you to watch. Listen to what he has to say and answer his question. Open a Google doc and write a letter to someone younger. It doesn't have to be someone you know. You can just start it; Dear Baby or Dear Kindergarteners or what ever you want. Tell them some of the awesome things they have to look forward to.
Here's the video: http://youtu.be/l5-EwrhsMzY