Just found this really interesting site that could be embedded into a website for kids. It offers a daily wondering and a searchable database. Fun for adults and kids to defined answers to questions like: what is a chick wagon, and who invented Lego. This is sponsored by Verizon's Thinkfinity and the National council for Family literacy.
http://wonderopolis.org/wonders/
http://wonderopolis.org/wonders/