This was for the 14 year old
He's kind of into numbers :)
I added a disclaimer on the back "not responsible for numerical accuracy - statistics generated by timeanddate.com" (very nifty site BTW!)
For my nine year old nephew I used a pop-up template from Robert Sabuda
I'll be working on a girly card next for my niece's birthday later in March. I just wish I would get these done a little sooner - instead of the morning I need to send them out - I guess I work best under pressure!!