Disc is stuck in my sons xbox360

Hi Jim,
I can see how your son might have felt missing his fav games for the day, apparently the only possible solution would be to open the XBOX and removing the disc manually. Make sure that the warranty sticker is not torn or scratched while you do this process.
And if you are not confident then I would recommend you to fedex it to Germany Hope this helps

(Note: both links have pics to help)
ok here is a link to take it part with out killing the drive
http://xbox-experts.com/tutorial/how-to-tweak-the-dvddrive-laser/downloads/XBOX_360_POT_CALIBRATION_V1.0_by_Moda.pdf

And here is a link to fix the problem once opened
http://xbox-experts.com/tutorial/fix-stuck-tray-issue-error/