The site looks like it will be a great resource especially for young people learning. Just curious why are you disallowing anyone under 18 from using it?
"ALL PERSONS UNDER THE AGE OF 18 ARE DENIED ACCESS TO THIS WEBSITE. IF YOU ARE UNDER 18 YEARS OF AGE, IT IS UNLAWFUL FOR YOU TO VISIT, READ, OR INTERACT WITH THIS WEBSITE OR ITS CONTENTS IN ANY MANNER. THIS WEBSITE SPECIFICALLY DENIES ACCESS TO ANY INDIVIDUAL THAT IS COVERED BY THE CHILD ONLINE PRIVACY ACT (COPA) OF 1998."