Hmmmm. You guys have given me some things to think about. I really like the want, need, read wear idea. He doesn't have his own ipad but is the main user of his Dad's so I don't think we will get another. But I could boost it with some things like some more games or ebooks. The pocket knife is an interesting idea. He might like that! I should note that we are having a trip away as a joint birthday present (as we are all around the same time) so we are going to Norway for a week next week (Vikings - yay!!). So that is part of his present but of course it's nice to open something on the day as well.
Thanks for all of your suggestions!!