I know many people that would buy something like this. It sounds like it would be a great into to the basics of the main web technologies.
You mention a database - client side local storage or server side? If server side, what server side language were you planning on using, out of curiosity?
Server side. I'd probably pick one or more web frameworks with simple ORMs. Basically take RoR, ASP.NET MVC/EF, and PHP Hello World applications, and add one more models and a couple of pages.
You mention a database - client side local storage or server side? If server side, what server side language were you planning on using, out of curiosity?